# MCQ Questions For Class 10 Science Chapter 12 Electricity

Students can refer to the following Electricity Class 10 MCQ Questions with Answers provided below based on the latest curriculum and examination pattern issued by CBSE and NCERT. Our teachers have provided here a collection of Electricity Class 10 MCQ Questions covering all topics in your textbook so that students can assess themselves on all important topics and thoroughly prepare for their exams

## Electricity Class 10 MCQ Questions with Answers

We have provided below Electricity Class 10 MCQ Questions with answers which will help the students to go through the entire syllabus and practice multiple choice questions provided here with solutions. As Electricity MCQs for Class 10 Science pdf download can be really scoring for students, you should go through all problems provided below so that you are able to get more marks in your exams.

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

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

d

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

D

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

B

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

D

Question: 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: 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: 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:  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

Question:  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: 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: 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. By what other name is the unit joule/coulomb called ?

Volt

Question. How much work is done when one coulomb charge moves against a potential difference of 1 volt ?

1 J

Question. a volt is a joule per coulomb.

(b)

(a) Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion.
(b) The Assertion and the Reason are correct but the Reason is not the correct explanation of the Assertion.
(c) Assertion is true but the Reason is false.
(d) The statement of the Assertion is false but the Reason is true.

Question: Assertion: Conductors allow the current to flow through themselves.
Reason: They have free charge carriers.

A

Question: Assertion: Bending of wire decrease the resistance of electric wire.
Reason: The resistance of a conductor depends on length, thickness, nature of material and temperature of the conductor.

A

Question: Assertion: In an open circuit, the current passes from one terminal of the electric cell to another.
Reason: Generally, the metal disc of a cell acts as a positive terminal.

D

Question: Assertion: When a battery is short circuited, the terminal voltage is zero.
Reason: In short circuit, the current is zero.

C

Question: Assertion: The statement of Ohm’s law is K = IR
Reason: V = IR is the equation which defines resistance.

C

Question: Connecting many resistors in parallel, will ____________ the resistance of the circuit.

Equivalent resistance in parallel combination will be smaller than the lest resistance used in circuit.

Question: Presence of argon prolongs the life of ____________ .

Filament of electric bulb

Question: Two resistors are in parallel when they have ____________ common points.

One

Question: Current is a ____________ quantity.

Current is a scalar quantity as it has no particular direction of flow.

Question: Work done on unit charge is called as ____________ .

Potential difference

Question: 746 watts make ____________ horse power.

One

in the following blanks with suitable words :

Question. Copper is a good…………….Plastic is an……………….

conductor ; insulator

Question. Potential difference is measured in …………..by using a ………………placed in……………across a component.

One

volts ; voltmeter ; parallel

Question. Name the law which relates the current in a conductor to the potential difference across its ends.

Ohm’s law

Question. Which one has a higher electrical resistance : a 100 watt bulb or a 60 watt bulb ?

60 watt bulb

Question. An electric bulb is rated at 220 V, 100 W. What is its resistance ?

484 Ω

Question. What current will be taken by a 920 W appliance if the supply voltage is 230 V ?

4 A

Question. If the current passing through a conductor is doubled, what will be the change in heat produced ?

Heat produced becomes four times

Question. Name the physical quantity whose unit is “ohm”.

Electrical resistance

Question. What is the general name of the substances having infinitely high electrical resistance ?

Insulators

Question. Keeping the potential difference constant, the resistance of a circuit is halved. By how much does the current change ?

Current becomes double

Question. A potential difference of 20 volts is applied across the ends of a resistance of 5 ohms. What current will flow in the resistance ?

4 A

Question. A resistance of 20 ohms has a current of 2 amperes flowing in it. What potential difference is there between its ends ?