# Class 10 Science Chapter 12 Electricity MCQ Questions with Answer

Electricity Class 10 MCQ is one of the best strategies to prepare for the CBSE Class 10 Board exam. If you want to complete a grasp concept or work on one’s score, there is no method except constant practice. Students can improve their speed and accuracy by doing more Electricity class 10, which will help them all through their board test.

## Electricity Class 10 MCQ Questions with Answer

Class 10 Science MCQ with answers are given here to Chapter 12 Electricity. These MCQs are based on the latest CBSE board syllabus and relate to the latest Class 10 Science syllabus. By Solving these Class 10 MCQs, you will be able to analyze all of the concepts quickly in the chapter and get ready for the Class 10 Annual exam.

Learn Electricity Class 10 MCQ with answers pdf free download according to the latest CBSE and NCERT syllabus. Students should prepare for the examination by solving CBSE Class 10 Electricity MCQ with answers given below.

Question 1. The device used for measuring potential difference is known as :
(a) potentiometer
(b) ammeter
(c) galvanometer
(d) voltmeter

d

Qestion 2. One coulomb charge is equivalent to the charge contained in :
(a) 2.6 × 1019 electrons
(b) 6.2 × 1019 electrons
(c) 2.65 × 1018 electrons
(d) 6.25 × 1018 electrons

d

Question 3. The work done in moving a unit charge across two points in an electric circuit is a measure of :
(a) current
(b) potential difference
(c) resistance
(d) power

b

Question 4. The unit for measuring potential difference is :
(a) watt
(b) ohm
(c) volt
(d) kWh

Question 5. Which of the following is the most likely temperature of the filament of an electric light bulb when it is working on the normal 220 V supply line ?
(a) 500°C
(b) 1500°C
(c) 2500°C
(d) 4500°C

c

Question 6. If the current flowing through a fixed resistor is halved, the heat produced in it will become :
(a) double
(b) one-half
(c) one-fourth
(d) four times

c

Question 7. Which of the following units could be used to measure electric charge ?
(a) ampere
(b) joule
(c) volt
(d) coulomb

D

Question 8. The p.d. across a 3Ω resistor is 6 V. The current flowing in the resistor will be :
(a) 1/2 A
(b) 1 A
(c) 2 A
(d) 6 A

c

Question 9. Which of the following represents voltage?
(a) Work done / Current×Time
(b) Work done × Charge
(c) Work done×Time / Current
(d) Work done × Charge × Time

A

Question 10. A cooler of 1500 W, 200 volt and a fan of 500 W, 200 volt are to be used from a household supply. The rating of fuse to be used is
(a) 2.5 A
(b) 5.0 A
(c) 7.5 A
(d) 10 A

A

Question 11. A current of 1 A is drawn by a filament of an electric bulb. Number of electrons passing through a cross section of the filament in 16 seconds would be roughly
(a) 1020
(b) 1016
(c) 1018
(d) 1023

a

Question 12. How much more heat is produced, if the current is doubled?
(a) twice the original amount
(b) thrice the original amount
(c) four times the original amount
(d) five times the original amount

c

Question 13. In order to reduce electricity consumption at home, what kind of appliance should one purchase?
(a) one which draws low power
(b) one which produces less heat
(c) one which operates at a higher voltage
(d) one which draws a high amount of current

C

Question 14. If n resistors each of resistance R are connected in parallel combination then their equivalent resistance is
(a) R/n2
(b) n2/R
(c) n/R
(d) R/n

C

Question 15. Which combination of a 2 Ω resistor and 4 Ω resistor offers the least resistance to current in the circuit?
(a) Series combination, which results in a net resistance of 2 Ω.
(b) Parallel combination, which results in a net resistance of 2 Ω.
(c) Series combination, which results in a net resistance of 1.5 Ω.
(d) Parallel combination, which results in a net resistance of 0.5 Ω.

D

Question 16. In an electrical circuit two resistors of 2 Ω and 4 Ω respectively are connected in series to a 6 V battery. The heat dissipated by the 4 Ω resistor in 5 s will be
(a) 5 J
(b) 10 J
(c) 20 J
(d) 30 J

C

Question 17. The image shows a combination of 4 resistors.
What is the net resistance between the two points in the circuit?
(a) 0.5 Ω
(b) 1.0 Ω
(c) 1.5 Ω
(d) 2.0 Ω

B

Question 18. If R1 and R2 be the resistance of the filament of 40 W and 60 W respectively operating 220 V, then
(a) R1 < R2
(b) R2 < R1
(c) R1 = R2
(d) R1 ≥ R2

B

Question 19. Which one among a bar of an alloy of mass 2 kg and a 3 kg iron bar of same dimension has greater resistivity?
(a) Iron bar because it has higher mass.
(b) Alloy bar because it has lower mass.
(c) Iron bar because it has the same types of atoms.
(d) Alloy bar because it has different types of atoms.

D

Question 20. Two bulbs are rated 40W, 220W and 60W, 220W. The ratio of their resistances will be:
(a) 4:3
(b) 3:4
(c) 2:3
(d) 3:2

D

Question 21. Two devices are connected between two points, say A and B in parallel. The physical quantity that will remain the same between the two points is
(a) current
(b) voltage
(c) resistance
(d) None of these

B

Question 22. Two resistors connected in series gives an equivalent resistance of 10 Ω. When connected in parallel, give 2.4 Ω. Then the individual resistance are
(a) each of 5 Ω
(b) 6 Ω and 4 Ω
(c) 7 Ω and 4 Ω
(d) 8 Ω and 2 Ω

D

Question 23. An electric toaster has a power rating of 200 W. It operates for 1 hour in the morning and 1 hour in the evening. How much does it cost to operate the toaster for 10 days at Rs 5 per kW h?
(a) Rs 20
(b) Rs 400
(c) Rs 5000
(d) Rs 10000

A

Question 24. Work of 14 J is done to move 2 C charge between two points on a conducting wire. What is the potential difference between the two points?
(a) 28 V
(b) 14 V
(c) 7 V
(d) 3.5 V

C

Question 25. What is the relationship between resistance and current?
(a) They are directly related to each other.
(b) They are inversely related to each other.
(c) The resistance has a greater magnitude than current.
(d) The current has a greater magnitude than resistance.

B

Question 26. When a 4 Ω resistor is connected across the terminals of a 12 V battery, the number of coulombs passing through the resistor per second is :
(a) 0.3
(b) 3
(c) 4
(d) 12

B

Question 27. A battery of 10 volt carries 20,000 C of charge through a resistance of 20 Ω. The work done in 10 seconds is
(a) 2 × 103 joule
(b) 2 × 105 joule
(c) 2 × 104 joule
(d) 2 × 102 joule

B

Question 28. Unit of electric power may also be expressed as
(a) volt ampere
(b) kilowatt hour
(c) watt second
(d) joule second

B

Question 29. An electrical appliance has a resistance of 25 Ω. When this electrical appliance is connected to a 230 V supply line, the current passing through it will be :
(a) 0.92 A
(b) 2.9 A
(c) 9.2 A
(d) 92 A

C

Question 30. If the resistance of a certain copper wire is 1 Ω, then the resistance of a similar nichrome wire will be about :
(a) 25 Ω
(b) 30 Ω
(c) 60 Ω
(d) 45 Ω

C

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Whoever needs to take the CBSE Class 10 Board Exam should look at this MCQ. To the Students who will show up in CBSE Class 10 Science Board Exams, It is suggested to practice more and more questions. Aside from the sample paper you more likely had solved. These Electricity Class 10 MCQ are ready by the subject specialists themselves.

Question 31. Ohm’s law gives a relationship between :
(a) current and resistance
(b) resistance and potential difference
(c) potential difference and electric charge
(d) current and potential difference

D

Question 32. A car headlight bulb working on a 12 V car battery draws a current of 0.5 A. The resstance of the light bulb is :
(a) 0.5 Ω
(b) 6 Ω
(c) 12 Ω
(d) 24 Ω

D

Question 33: The heating element of an electric heater should be made with a material, which should have
(a) high specific resistance and high melting point
(b) high specific resistance and low melting point
(c) low specific resistance and low melting point
(d) low specific resistance and high melting point

A

Question 34: Resistance of conductor is doubled keeping the potential difference across it constant. The rate of generation of heat will
(a) become one fourth
(b) be halved
(c) be doubled
(d) become four times

B

Question 35. If the diameter of a resistance wire is halved, then its resistance becomes :
(a) four times
(b) half
(c) one-fourth
(d) two times

A

Question 36. Keeping the potential difference constant, the resistance of a circuit is doubled. The current will become :
(a) double
(b) half
(c) one-fourth
(d) four times

B

Question 37: In house electrical circuits the fuse wire for safety should be of
(a) High resistance – high melting point
(b) Low resistance – high melting point
(c) Low resistance – low melting point
(d) High resistance – low melting point

D

Question 38:If a wire of resistance 1Ω is stretched to double its length, then resistance will be
(a) 1/2Ω
(b) 2 Ω
(c) 14Ω
(d) 4 Ω

D

Question 39: Power dissipated across the 8Ω resistor in the circuit shown here is 2 watt. The power dissipated in watt units across the 3Ω resistor is

(a) 1.0
(b) 0.5
(c) 3.0
(d) 2.0

C

Question 40: A current I passes through a wire of length l, radius r and resistivity ρ. The rate of heat generated is
(a) I2ρl/r
(b) I2ρl/πr2
(c) I2ρl/πr
(d) none of these

B

Question 41: The diameter of a wire is reduced to one-fifth of its original value by stretching it. If its initial resistance is R, what would be its resistance after reduction of the
diameter?
(a) R/625
(b) R/25
(c) 25 R
(d) 625 R

D

Question 42: In the circuit diagram shown below, VA and VB are the potentials at points A and B respectively. Then,VA – VB is 30V  96
(a) –10 V
(b) –20 V
(c) 0 V
(d) 10 V

D

Question 43: What is the equivalent resistance of the following arrangement between M and N
(a) R/2
(b) R/3
(c) R/4
(d) R/6

B

Question 44: Across a metallic conductor of non-uniform cross section a constant potential difference is applied. The quantity which remains constant along the conductor is :
(a) current
(b) drift velocity
(c) electric field
(d) current density

A

Question 45: The resistance of a wire is R. After melting it is remouled such that its area of cross section becomes n times its initial area of cross section. It new resistance will be
(a) nR
(b)R/n
(c) n2R
(d) R/n2

D

Question 46: The resistance of a wire is ‘R’ ohm. If it is melted and stretched to ‘n’ times its original length, its new resistance will be :
(a) R/n
(b) n2R
(c)R/n2
(d) nR

B

Question 47: A heater coil is cut into two equal parts and only one part is used in the heater, the heat generated now will be
(a) doubled
(b) four times
(c) one fourth
(d) halved

A

Question 48: Three electric bulbs of rating 40 W – 200 V; 50 W – 200 V and 100 W – 200 V are connected in series to a 600 V supply. What is likely to happen as the supply is switched
on?
(a) Only 50 W bulb will fuse
(b) Both 40 W and 50 W bulbs will fuse.
(c) All the three bulbs will emit light with their rated powers.
(d) 100 W bulb will emit light of maximum intensity.

B

Question 49: What is the current supplied by the battery in the circuit shown below? Each resistance used in circuit is of 1 kW and potential difference VAB= 8V  103
(a) 64 mA A
(b) 15 mA
(c) 9.87 mA
(d) 1 mA

B

Question 50: A wire of resistance R is bent to form a square ABCD as shown in the figure. The effective resistance between E and C is: (E is mid-point of arm CD)
(a) R
(b) 7/64R
(c) 3/4R
(d) 1/16R

B

Question 51: In the circuit given, the ratio of work done by the battery to maintain the current between point A and B to the work done for the whole circuit is

(a) 1/117
(b) 1/13
(c) 1/12
(d) 1

B

Question 52: If the ammeter in the given circuit reads 2 A, What is the value of resistence R (the resistance of ammeter is negligible).

(a) 1Ω
(b) 2Ω
(c) 3 Ω
(d) 4 Ω

A

Question 53: A circuit to verify Ohm’s law uses ammeter and voltmeter in series or parallel connected correctly to the resistor. In the circuit :
(a) ammeter is always used in parallel and voltmeter is series
(b) Both ammeter and voltmeter must be connected in parallel
(c) ammeter is always connected in series and voltmeter in parallel
(d) Both, ammeter and voltmeter must be connected in series

C

Question 54: From a power station, the power is transmitted at a very high voltage because –
(a) it is generated only at high voltage
(b) it is cheaper to produce electricity at high voltage
(c) electricity at high voltage is less dangerous
(d) there is less loss of energy in transmission at high voltage

D

Question 55: A copper wire is stretched to make it 0.5% longer. The percentage change in its electrical resistance if its volume remains unchanged is:
(a) 2.0%
(b) 2.5%
(c) 1.0%
(d) 0.5%

C

Question 56: A wire of resistance R is bent to form a square ABCD as shown in the figure. The effective resistance between E and C is: (E is mid-point of arm CD)
(a) R
(b) 7/64R
(c) 3/4R
(d) 1/16R

B

Question 57: Which of the following acts as a circuit protection device?
(a) conductor
(b) inductor
(c) switch
(d) fuse

D

Question 58:  A student in a town in India, where the price per unit (1 unit = 1 kW-hr) of electricity is `₹5.00, purchases a 1 kVA UPS (uninterrupted power supply) battery. A day before the exam, 10 friends arrive to the student’s home with their laptops and all connect their laptops to the UPS. Assume that each laptop has a constant power requirement of 90 W. Consider the following statements
I All the 10 laptops can be powered by the UPS if connected directly.
II All the 10 laptops can be powered if connected using an extension box with a 3A fuse.
III If all the 10 friends use the laptop for 5 hours, then the cost of the consumed electricity is about `22.50. Select the correct option with the true statements.
(a) I only
(b) I and II only
(c) I and III only
(d) II and III only

C

Question 59: An electric bulb is rated 220V and 100W. When it is operated on 110V, the power consumed will be
(a) 100W
(b) 75W
(c) 50W
(d) 25W

D

Question 60: Two electric bulbs rated P1 watt V volts and P2 watt V volts are connected in parallel and applied across V volts. The total power (in watts) will be
(a) P1 + P2
(b) √P1 P2
(c) P1P2/P1+P2
(d)P1+P2/P1P

A

Question 61: Six similar bulbs are connected as shown in the figure with a DC source of emf E, and zero internal resistance. The ratio of power consumption by the bulbs when (i) all are glowing and (ii) in the situation when two from section A and one from section B are glowing, will be:

(a) 4 : 9
(b) 9 : 4
(c) 1 : 2
(d) 2 : 1

B

Question 62:  In the circuit shown below, a student performing Ohm’s law experiment accidently puts the voltmeter and the ammeter as shown in the circuit below. The reading inthe voltmeter will be close to
(a) 0 V
(b) 4.8 V
(c) 6.0 V
(d) 1.2 V

C

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