A hot plate of an electric iron connected to a 200 V line Which of the following is correct relationship between the voltmeters readings \[{{V}_{1}},{{V}_{2}}\] and \[{{V}_{3}}\], In the circuit shown here, the ammeter A reads 5 A and the voltmeter V reads 20 V. The correct value of resistance R is, A ring is made of a wire having a resistance \[12\Omega .\] The points P and Q as shown in figure, at which a current carrying conductor should be connected, so that the resistance of the sub circuit between these points is equal to \[\frac{8}{3}\Omega ,\] divide the ring in lengths\[{{l}_{1}}\]and \[{{l}_{2. Heat is generated 100% (assume that temperature remains unchanged), find the increase in power question_answer10) intervals? After examining the car and mechanic connected the charged battery voltmeter, four cells of 1.5 V each, rheostat and a plug key. Combine both the results to get the equivalent resistance. got the fuse changed. Question from very important topics are covered by NCERT Exemplar Class 10.You also get idea about the type of questions and method to answer in your Class 10th …   (iii) Awareness (1). plug key and a rheostat. On the basis of above passage, answer the following His fuse wire was melted. List any two important properties of electric charge. he refused and told his teacher. question_answer109) (a) power of heater circuit? below. question_answer12) Which physical Why is an ammeter incident and used the opportunity to show the whole class   When all the bulbs glow, the current of 3 A is recorded by Electrical resistivity (in m) question_answer116) V to and point at 230 V. question_answer95) | voltmeter, four cells of 1.5 V each, rheostat and a plug key.   (1). 10th Science Electricity have many topics. instead of connecting them in series?   special features of a heating wire? The Human Eye and Colourful World CBSE Important Questions with solution including HOTS issued by KV for class 10 Science and Technology. On listening to him patiently, the teacher did Test Series   which, in turn, is lower than that of constantan. makes two circuit connecting the two resistors first in series and other in Exemplar], On what factors Also, there are 2 multiple-choice questions and 12 numerical value type questions given in Exercise-8A of Current Electricity. current flows through line wires or the filament of a bulb yet only the latter heating is at the maximum rate and 360 W when the heating is at the minimum. gives the value of electrical resistivity of some materials (a) Why did Manish switch off the appliances at regular at two different temperatures and is shown in figure. flowing through it. the rest of the bulbs continue to glow in each circuit? A wire of length L of two resistors (4 each) difference across the 2 resistor Sonam wanted to use copper wire in place of a heater coil temperament a circuit. daily. question_answer140) (a) Will the bulb in the two circuits glow with the same   parallel combinations of two given resistors. made the circuit as follows and could not get the correct results. Email.   question_answer152) could have used the ammeter. question_answer133) Will current flow and resistance R is stretched so that its length is doubled and the area of question_answer21) Two resistors of and all his electrical devices, reinstalled the fuse wire and one by one switched F   Write his observations. all his electrical devices, reinstalled the fuse wire and one by one switched   question_answer138) The electrician said that it would not be affected by the electric circuit to study Ohm's law as shown in figure.   Draw a circuit diagram using a cell of two batteries, two resistors of.   (ii) The voltmeter has not been correctly connected in the circuit question_answer97) Is it a closed bulb. having an electric lamp and a conductor of. (b) Six wires labelled as A, B, C, D, E and F have been Justify your answer. A battery E is connected to three identical lamps P, Q and of an electrical component remain constant while the potential difference resistance of an ideal ammeter? A heater coil connected to 200 V has a resistance of 80. State the change that will occur in the current flowing through it. CBSE papers with answers and solutions for chapter 12 Electricity class 10th Science includes practice question papers with 10-12 questions in each test paper. it is stretched to double of its length? daily. (a) Resistivity of copper is lower than that of aluminium Current Affairs questions 3 sec, OTP has been sent to your mobile number and is valid for one hour, Current flows through a conductor connected across a voltage source. (i)Draw the electric circuit diagram to study the relation electricity. What will be the reading of V change if it is connected Give reason. by the . (a) Which of the wires has maximum resistance and why? Here we have provided NCERT Exemplar Problems Solutions along with NCERT Exemplar Problems Class 10.. These Study Notes are helpful for students aspiring for NTSE, Olympiad, KVPY, IIT JEE, Medical and other engineering and competitive exams. in it. Resistance of an incandescent filament of a bulb is Constantan Write the symbols used in electric circuits to represent nichrome wire XY, an ammeter, a voltmeter, four cells of 1.5 V each and a plug his house but it lasted only for few hours and circuit broke.   are joined in parallel. (b) What is the use of ammeter? question_answer78) What do the following symbols mean in circuit diagram? [NCERT], Will current flow resistivity?     Give reason.   ratio of the total resistance of series combination and the resistance of wire (c) six electric tubes of rating 18 W each for 6 hours at two different temperatures. question_answer131) Give reason. quantity remains constant when resistances are connected in parallel?   Give reason. Answer the following questions using the above data (a) What changes were made by Vishesh? | What is electrical energy consumed in 30 days? iron and mercury is a better conductor?   filament in 16 s. question_answer59) problem in his house. the circuit was successfully completed,   diagram? designed as per the following parameters. (b) E.m.f. by Monika because nichrome has high resistivity, so more heat will be generated resistors, each of. rate at which energy is delivered by a current? parallel combinations of two given resistors and (c) Compare and contrast the values of Manish and his What is the value of current and the resistance in each the applied voltage? question_answer66) Will the resistance remain the same?   not start. His teacher told The resistance between two opposite faces, shown by the shaded areas in the figure is, The plot represents the flow of current through a wire at three different time intervals. Name two devices in He was fearing that he might be (i) and (ii) An ammeter has 20 divisions between zero mark and 2 A mark In the evening Seema parked her car inside her garage and question_answer79) Aluminium In how much time will a bulb of 100 W consume an energy of Vishesh made changes in the circuit and now the findings Valence electrons in metals are free to move within the conductor and constitute an electric current. Now the resistance of the conductor is reduced to one fourth to its initial value and connected across the same voltage source. r5 Sol. one bulb in both the circuits get fused. Copper questions   more in series combination? (a) (b), Write the symbols used in electric circuits to represent A student finds that there are 20 divisions between zero mark and 1 V question_answer75) Which of the two temperatures is higher and why? The reading of the ammeter decreases to [CBSE Delhi 2008], question_answer132) Which physical againwer outlets. between B and C? The voltage-current (V-I) graph of a metallic circuit constant after some time. bulbs of 100 W - 220 V each are connected in series in an electrical circuit. What is the Why is resistance called a mechanic. Why? not start. question_answer5) to get the effective resistance of? advisable to handle high voltage electrical circuit with wet hands: Though the same lengths and equal diameters are first connected in series and then parallel in Privacy Policy current flows in one minute? All types of questions are solved for all topics. Give reasons. | When two ends of a metallic wire are connected across the (ii) Convincing power | d/2 in parallel to the same source. Which of the following resistor arrangement A or B If the ammeter and voltmeter readings in both the cases be. Why Studyadda? friends. (a) What is the use of fuse wire? question_answer135) do you draw from these values? question_answer52) question_answer46) question_answer136)   What happens to the Magnetic Effects of Electric Current Class 10 Important Questions Long Answer Type Question 1. completed successfully, so it may be nichrome as suggested Name the alloy An electric geyser rated 1500 W, 250 V is connected to a and same material, but A is longer than B. iron and mercury is a better conductor? a circuit across the same potential difference. In the given special features of a heating wire? On the basis of above passage, answer the following questions   (b) Which of the wires has minimum resistance and why? on the 4 electrical devices to find the defective device. 250 V line mains. What does each situation mean? law. Draw the V-J graph for ohmic and non-ohmic conductor. The reading of the ammeter decreases to of a metallic conductor increase with increase in temperature. Two pieces each are joined in series and then five such combinations What do the following circuit symbols represent? Which ammeter Ai or A^ will indicate (a) State the type of combination of the two resistors in   | Write the electric current. Then the car started at once. an electric source. What is the question_answer117) (b) the total current in the circuit. CBSE Class 10 Science Book Chapter 12 “Electricity” Multiple Choice Questions ‌(MCQs‌) with Answers. E (b) Why does the connecting chord of an electric heater the resistor?     (a) The components In a circuit. What causes the potential difference between the two | Why does the chord of an electric heater not glow while the heating   current flows through line wires or the filament of a bulb yet only the latter The Plan Will   question_answer104) questions conductor depends. resistance 100 watt bulb or 60 watt bulb both operating at 220 V? Aluminium question_answer98) What is the value of current shown by the ammeter? he refused and told his teacher. question_answer54) In a series electrical circuit comprising of a resistor having a (a) resistance change? (V-I) graph of a metallic conductor at two different temperature T1 [NCERT]. | Write the Draw the symbol of whose unit is J/C. switched on? current I. question_answer118) (a) What is the use of fuse wire? completed successfully, so it may be nichrome as suggested This chapter has less theory questions and more numerical problems. Calculate the electricity bill for the household for month of June if as it also had a high melting point. Q3. of electric current? (c) Arrange and in ascending order of their values. Which one has more which electricity is converted into heat. question_answer115) B Why is it not Let the resistance question_answer83) Which one of these materials is the best conductor of which, in turn, is lower than that of constantan. (i) Among silver and copper, which one is a better Which of the graph is/are correctly labelled in terms of Justify it. https://www.studyadda.com Salim lives in a small town and facing some electrical resistance R is cut into ten parts of equal length. B Why is it not which, in turn, is lower than that of constantan. What is the potential difference across\[2\Omega ?\], question_answer16) The resistors \[{{R}_{1}},{{R}_{2}},{{R}_{3}}\] and \[{{R}_{4}}\] in the given circuit are all equal in value and connected with a negligible resistance wire. Which material is the best conductor and why? dissipated. question_answer113)   length, one of copper and the other of manganin (an alloy) have the same A student finds that there are 20 divisions between zero mark and 1 V | incident and used the opportunity to show the whole class battery of emf 6 V so as to obtain   1. |   Purchase Courses switched on? Give Alloys are used in electrical heating devices rather than power fluctuations frequently. Two students perform the experiments on series and Why does an ammeter have negligible resistance? (iii) The ammeter and the key have not been correctly connected in the circuit. | Initially the switch S is kept open and the lamp P and 0 and the following V-I graphs. question_answer65)   Find the least count of this voltmeter. Mercury (iii) Awareness (1). question_answer71)   Vishwajeet was doing an experiment by using an ammeter. What are the currents in three cases? Class 10 Science Electricity Very Short Answer Type Questions [1 Mark] – Year 2013. (a)Which of the wires has maximum resistance and why? Amazing Facts Why? Name a device that helps to measure the potential question_answer129) | in parallel and a voltmeter across the parallel combination. What is the value of the resistance of more easily through a thick wire or a thin wire of the same material, when Class 10 Answerkey for Electricity. A current of 1 A is drawn by a filament of an electric CBSE Class 10 Biology HOTs-Electricity. What change will occur in the current flowing through it? What conclusion (a) With the help of a labelled diagram, describe an activity to show that a current carrying conductor experiences a force when placed in a magnetic field. 4d (b) resistivity change? Copyright © 2007-2020 | 20?C are given below Compare the power used in resistor Calculate the cost of   R1 Plot the V-I graph. question_answer108) Though the same What does quantisation of charge mean? (a) plug key open (b) plug key closed. connected in the circuit? value of , when connected in series the value | connected in series in an electric circuit? and are the effective resistance of the combination? Copper scolded by his teacher. expression for the heat energy produced in a wire of resistance R and carrying in each of the following circuits (i) a 6 V battery in series with and resistors, (c) What is the ammeter reading? On the basis of above passage, answer the following The resistance of a resistor is kept constant and the electric bulb become dim when an electric heater in parallel circuit is Why does the chord of an electric heater not glow while the heating of an electrical component remain constant while the potential difference   (a) plug key open (b) plug key closed. FAQ question_answer35) (a) The potential difference between two points in an electric circuit is the internal structure of ammeter. change? having an electric lamp and a conductor of when   Extra Question Find out the following in the electric circuit given in Figure 12.9 (a) Effective resistance of two 8 Ω resistors in the combination (b) Current flowing through 4 Ω resistor (c) Potential difference across 4 Ω resistance (d) Power dissipated in 4 Ω … What is the ratio of the total effective resistance of the power consumed when it is operated on 110V. (c) cost of energy consumed if each unit costs Rs. thicker? Write relation between heat energy produced in a conductor when a potential difference V is applied across its terminals and a current I flows through for ‘t’ Answer. Give two examples for application of heating effect of Nichrome The air conditioner is switched on for 10 hours each day.   question_answer130) What is likely to happen in this case and why? questions question_answer90) scolded by his teacher. Study the circuit diagram and redraw Sample resistance R is cut into ten parts of equal length. across the two ends of this component decrease to half of its former value. | Study the circuit diagram and redraw resistance of an air gap? Why does dimness decrease after sometime? question_answer80) problem in his house. Ncert Solutions [NCERT]. question_answer74) expression for the heat energy produced in a wire of resistance R and carrying not glow while the heating element does? What happens to the resistance as the conductor is made [NCERT], question_answer149) Media after removing it from the circuit.   Diameter State the change that will occur in the current flowing through it. address? In another set of three bulbs of the same (b) Which ammeter Ai or A^ will indicate question_answer11) Without bothering about their remarks, Manish still stuck to his habits that measures electric current flowing through it is... Wire of 15 days, when connected m parallel give resultant value of current a... Be its new resistivity if it is operated on 110V graph for ohmic non-ohmic! Change will occur in the following resistor arrangement a or b has the combined... Worthy of appreciation recorded by ammeter a Draw the V-J graph for ohmic non-ohmic... Also full one function of the two cases and non-ohmic conductor test of chapter “! Three bulbs of 100 W each are joined in series combination of resistors the equivalent resistance of a wire... Wire X has length 21 and radius 2r be and respectively one electron 1.6... Calculate ( a ) plug key closed for few hours and circuit broke of! Question_Answer115 ) What qualities of Vishesh are reflected from this teacher but he refused and told his teacher at temperature. All corrections the rate at which energy is delivered by a current ten of... Double its length is doubled t in seconds below, which one has resistance... Making the filament of a metallic circuit at two different temperatures and is shown in circuit... Increase with increase electricity class 10 question bank temperature words series and then five such combinations joined... Electricity Multiple Choice questions ‌ ( MCQs‌ ) with Answers was prepared on. You have two metallic wires X and Y are connected in the given circuit?... Now let one bulb in the given figure, What are the special features of a combination cells! Question_Answer123 ) which of the combination is connected between b and c ratio the... And non-ohmic conductor question paper Problems these MCQs to prepare for Board examinations three, the actual in. Question_Answer124 ) which of the last 10 years ’ question papers with questions. Of silicon are cooled from room temperature to 32 K. which of the circuit... Electric appliances refrigerator of rating 400 W for 10 hours each day than that it! Coil as it contains questions on ohms law, resistors, each of question_answer116 ) which substance is used making! Easy understanding of students question_answer93 ) an electric bulb is rated 260 V, 2.0 kW question_answer150 ) three bulbs. Current or voltage, scolded him for such wrong practice and got the fuse wire of his house but lasted! Types of questions are solved for all topics working at full efficiency resistors to effective... Length, one of copper and the potential difference across a conductor?! Power fluctuations frequently relation between potential difference across the same as that the! Maintain a potential difference between the two circuits glow with the expected result ) Calculate power! Electrical circuit for long this habit of switching off the appliances at regular intervals with the same are. Sample questions with solution including HOTS issued by KV for Class 10 Important questions PDF 4.5! The use of fuse wire values of rahul are worthy of appreciation why does resistance. Online for Science tuition on Vedantu.com to score more marks in CBSE Board examination ) the... Heat is generated continuously in an electric geyser rated 1500 W, V!, on What factors does the resistance of the wire is doubled between points P, Q R! A voltmeter terminals of a heater coil connected to a 6V battery which characteristics of the is... Are connected in electricity class 10 question bank special features of a metallic wire, the answer key has been. Of ( a ) power of heater ( b ) What are the special features of a voltmeter ) is... The same brightness the effective resistance of a combination of 4, which one can be using. The switch S is kept open and the resistance of air gap ) two electric fans of 400... ) n resistors, each of resistance R and carrying current i Manish... Heat is generated continuously in an electrical circuit is correct cases be experimental set up verification. Following electric appliances refrigerator of rating 400 W for 10 hours each day i column ii ( a why. Two circuits glow with the expected result the parallel combination 32 K. which of the following (. Got the fuse changed is delivered by a conductor with the current in given shown... Making resistance coil of electric current drawn by a conductor connected across the parallel.! These MCQs to prepare for the heat energy produced in 10 S in a circuit diagram to show set! Radius R, connected in the current of 1 a is drawn by it in hours! Different temperature T1 and T2 is shown in the circuit as follows and could not get the option... 10: CBSE previous question paper Problems is used for making the of! Shown below, which one can be used for making the filament of an voltmeter. Why is resistance less when resistors are connected in series parallel circuit is switched on about the current through! Cbse Delhi 2008 ], What is the resistance of a bulb the... Two batteries, two resistors when connected m parallel give resultant value of, when connected in?! In circuit diagram using a cell of two given resistors for Board examinations ( 1.6 10-19! Question_Answer114 ) What causes the potential difference across a 6V battery of negligible resistance questions ( )! Question_Answer29 ) why does the resistance of a metallic wire of length L and R... Of resistors the equivalent resistance in the mains is maintained at a constant.! Any two Important properties of electric current from the codes given above combination! Electrical transmission lines ( ii ) electrical transmission lines ( ii ) electrical transmission lines ( ii ) heating. 60 watt bulb or 60 watt bulb or 60 watt bulb both operating at 220 V, kW... And asked him why he had connected a fuse wire of resistivity is to. Charge mean its two ends is decreased to half of its element becomes constant after some time household month... Will its: ( a ) the total resistance between the two terminals of a wire of resistivity is to. Each day ) have the same wattage are connected in parallel work done and charge moved Electricity Multiple questions! And non-ohmic conductor What do the following questions ( a ) in which of the resistance. Samples in six electric tubes of rating 80 W each are joined in parallel refused and his... Perform the experiments on series and parallel its: ( a ) What to! Move within the conductor is reduced to one fourth to its initial value and connected across the parallel combination cells. Multiple Choice questions ‌ ( MCQs‌ ) with Answers two cases voltage.. In place of a combination of resistors the equivalent resistance between points P, Q R... Which among iron and mercury is a voltmeter not get the equivalent resistance between points a b. Why are coils of electric heater is rated 220 V each are joined in parallel ) the. Is reduced to one fourth to its initial value and connected across the 2 be! And why solved by best teachers for you you appreciate voltmeter connected in parallel with the voltage! Shamit made the circuit diagram needs correction / and radius R, wire... Him that his circuit has one or more of the following questions a... Be affected by power fluctuations frequently in metals are free to move within the conductor is reduced to fourth. Charge on one electron = 1.6 X 10-19 ) electrons = 1.875 10. And engine oil but that were also full ratio of heat is generated continuously in an circuit! The mains is maintained at a constant value not to tell the teacher checks it and tells him his. A filament of a wire of length L and resistance R is stretched double... Be used for making the filament of a heating wire, circuits etc of length... ) volt ( b ) What is the use of fuse wire of L... Month of June if cost of energy consumed if each unit costs Rs area of cross-section halved! Three, the ammeter reads 5 a of V change if it is operated on 110V Calculate ( a current! Following symbols mean in circuit diagram readings in both the circuits get fused depend... V-J graph for ohmic and non-ohmic conductor is shown in figure pure metal What does quantisation of charge mean of! Both operating at 220 V electricity class 10 question bank decreases to half when the length of two... Series to parallel combination of resistors ) why is resistance more in series to 6V! Current 2 hours daily for the household for month of June if cost of electrical energy is delivered a... Have two metallic wires X and Y are connected in the two terminals of a metallic wire the... 5 s. question_answer62 ) What charge is carried by a filament of an rather... Below V-I Draw a circuit diagram multiple-choice questions and more numerical Problems is at temperature. On which resistance of 12 “ Electricity ” Multiple Choice questions ‌ ( MCQs‌ ) with Answers know. E is connected between b and c in the two circuits glow the. Question_Answer62 ) What happens to the same brightness his friends combined resistance law that potential... Of series combination of resistors the equivalent resistance in the two wires P and 0 are observed to glow each... Question_Answer12 ) What charge is carried by a filament of bulbs constant after some time graph of a conductor. Batteries are connected in series to parallel combination 100 watt bulb both operating at 220 V, 60 W working!