MCQs for Class 10 Science Chapter 12 Electricity

MCQs for Class 10 Science Chapter 12 Electricity: In this article, we have covered all the important MCQs for Free for Class 10 Term 1 2021-22 Board Exams. In accordance with the latest pattern, Padhle is here with MCQ Questions for Class 10.

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MCQ for Class 10 Science Chapter 12 Electricity

Question 1:
Which of the given is the SI Unit of Electric Current?
(a) Ohm
(b) Ampere
(c) Volt
(d) Faraday

Answer: (b) Ampere

Question 2:
What is the amount of current flowing through an electric press, if the amount of charge passing through a conductor in 10 minutes is 300 C?
(a) 30 A
(b) 0.3 A
(c) 0.5 A
(d) 5 A

Answer: (c) 0.5 A

Question 3:
When electric current is passed, electrons move from:
(a) high potential to low potential.
(b) low potential to high potential.
(c) in the direction of the current.
(d) against the direction of the current.

Answer: (b) low potential to high potential.

Question 4:
A wire of length /, made of material resistivity ρ is cut into two equal parts. The resistivity of the two parts are equal to,
(a) ρ
(b) \(\frac{\rho}{2}\)
(c) 2 ρ
(d) 4 ρ

Answer: (a) ρ

Question 5:
The hindrance presented by material of conductor to the smooth passing of electric current is known as:
(a) Resistance
(b) Conductance
(c) Inductance
(d) None of these

Answer: (a) Resistance

Question 6:
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

Answer: (c) 9.2 A

Question 7:
The heating element of an electric iron is made up of:
(a) copper
(b) nichrome
(c) aluminium
(d) iron

Answer: (b) nichrome

Question 8:
The temperature of a conductor is increased. The graph best showing the variation of its resistance is
MCQ Questions for Class 10 Science Electricity with Answers 1

Answer: (a)

Question 9:
A fuse wire is inserted in which wire?
(a) Live wire
(b) In the neutral wire
(c) In the earth wire
(d) May be connected in any line

Answer: (a) Live wire

Question 10:
When a 4 Ω resistor is connected across the terminals of a 2 V battery, the number of coulombs passing through the resistor per second is:
(a) 0.5
(b) 1
(c) 2
(d) 4

Answer: (a) 0.5

Question 11:
The electrical resistance of insulators is
(a) high
(b) low
(c) zero
(d) infinitely high

Answer: (d) infinitely high

Question 12:
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 × 10⁵joule
(c) 2 × 10⁴ joule
(d) 2 × 10² joule

Answer: (b) 2 × 10⁵joule

Question 13:
The rate of flow of an electric charge is known as :
(a) Electric potential
(b) Electric conductance
(c) Electric current
(d) None of these

Answer: (c) Electric current

Question 14:
Keeping the potential difference constant, the resistance of the circuit is halved. The current will become:
(a) One-fourth
(b) Four times
(c) Half
(d) Double

Answer: (d) Double

Question 15:
Electrical resistivity of any given metallic wire depends upon
(a) its thickness
(b) its shape
(c) nature of the material
(d) its length

Answer: (c) nature of the material

Question 16:
A boy records that 4000 joule of work is required to transfer 10 coulomb of charge between two points of a resistor of 50 Ω. The current passing through it is
(a) 2 A
(b) 4 A
(c) 8 A
(d) 16 A

Answer: (c) 8 A

Question 17:
The instrument used for measuring electric current is :
(a) Ammeter
(b) Galvanometer
(c) Voltmeter
(d) Potentiometer

Answer: (a) Ammeter

Question 18:
If in the given arrangement, the three resistors are to be replaced by a single resistor. What will be the value of this resistor?

(a) 4Ω
(b) 6Ω
(c) 9Ω
(d) 18Ω

Answer: (c) 9Ω

Question 18:
Electric power is inversely proportional to
(a) resistance
(b) voltage
(c) current
(d) temperature

Answer: (a) resistance

Question 19:
The resistance whose V-I graph is given below is
MCQ Questions for Class 10 Science Electricity with Answers 2

Answer: (b)

Question 20:
The amount of work done in joules, when one unit electric charge moves from one point to another point in an electric circuit is called :
(a) Electric current
(b) Electric resistance
(c) Electric conductance
(d) Potential difference

Answer: (d) Potential difference

Question 21:
The potential difference across the 3 Ω resistor in the following diagram is:

(a) 1/9 V
(b) 1/2 V
(c) 2V
(d) 1V

Answer: (d) 1V

Question 22:
What is the commercial unit of electrical energy?
(a) Joules
(b) Kilojoules
(c) Kilowatt-hour
(d) Watt-hour

Answer: (c) Kilowatt-hour

Question 23:
To get 2 Ω resistance using only 6 Ω resistors, the number of them required is
(a) 2
(b) 3
(c) 4
(d) 6

Answer: (b) 3

Question 24:
The unit of potential difference is :
(a) Volt
(b) Ohm
(c) Ampere
(d) Faraday

Answer: (a) Volt

Question 25:

V₁, V₂ and V₃ are the potential differences across the 1Ω, 2Ω and 3Ω resistors in the following diagram, and the current is 5A.

Which of the following shows the correct values of V₁, V₂ and V₃ measured in volts?

(a) V₁ =1, V₂ = 2 and V₃ = 3
(b) V₁ =5, V₂ = 10 and V₃ = 15
(c) V₁ =5, V₂ = 2.5 and V₃ = 1.6
(d) V₁ =4, V₂ = 3 and V₃ = 2

Answer: (b) V₁ =5, V₂ = 10 and V₃ = 15

Question 26:
Three resistors of 1 Ω, 2 ft and 3 Ω are connected in parallel. The combined resistance of the three resistors should be
(a) greater than 3 Ω
(b) less than 1 Ω
(c) equal to 2 Ω
(d) between 1 Ω and 3 Ω

Answer: (b) less than 1 Ω

Question 27:
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

Answer: (b) voltage

Question 28:
The relation between potential difference (V) and current (I) is :
(a) V α I2
(b) V α 1/I
(c) V2 α I
(d) V α I

Answer: (d) V α I

Question 29:
A wire of resistance R₁ is cut into five equal pieces. These five pieces of wire are then connected in parallel. If the resultant resistance of this combination be R₂, then the ratio R₁/ R₂ is:
(a) 1/25
(b) 1/5
(c) 5
(d) 25

Answer: (d) 25

Question 30:
An electric bulb is connected to a 220V generator. The current is 0.50 A. What is the power of the bulb?
(a) 440 W
(b) 110 W
(c) 55 W
(d) 0.0023 W

Answer: (b) 110 W

Question 31:

Calculate the current flows through the 10 Ω resistor in the following circuit.
MCQ Questions for Class 10 Science Electricity with Answers 5
(a) 1.2 A
(b) 0.6 A
(c) 0.2 A
(d) 2.0 A

Answer: (b) 0.6 A

Question 32:
The relation between potential difference (V) and current (I) was discovered by :
(a) Newton
(b) Ampere
(c) Ohm
(d) Volta

Answer: (c) Ohm

Question 33:
Two appliances of rating 200 watt-250 volts and 100 watt-250 volts are joined in series to a 250 volts supply. Total power consumed in the circuit is
(a) 46 watt
(b) 67 watt
(c) 10 watt
(d) 30 watt

Answer: (b) 67 watt

Question 34:
The resistivity of insulators is of the order of
(a) 10^-8 Ω^-m
(b) 10¹ Ω^-m
(c) 10^-6 Ω^-m
(d) 10⁶ Ω^-m

Answer: (a) 10^-8 Ω^-m

Question 35:
Two resistors are connected in series gives an equivalent resistance of 10 Ω. When connected in parallel, gives 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

Answer: (b) 6 Ω and 4 Ω

Question 36:
The obstruction offered by material of conductor to the passage of electric current is known as :
(a) Resistance
(b) Conductance
(c) Inductance
(d) None of these

Answer: (a) Resistance

Question 37:
When a current ‘I’ flows through a resistance ‘R’ for time ‘t’ the electrical energy spent is given by
(a) IRt
(b) I²Rt
(c) IR²t
(d) I²R/t

Answer: (b) I²Rt

Question 38:
In the given figure, the resistors

(a) 6 Ω, 3 Ω and 9 Ω are in series
(b) 9 Ω and 6 Ω are in parallel and the combination is in series with 3 Ω
(c) 3 Ω, 6 Ω and 9 Ω are in parallel
(d) 3 Ω and 6 Ω are in parallel and the combination is in series with 9 Ω

Answer: (d) 3 Ω and 6 Ω are in parallel and the combination is in series with 9 Ω

Question 39:
Two electric bulbs have resistances in the ratio 1:2. If they are joined in series, the energy consumed in them is in the ratio.
(a) 2:1
(b) 1:2
(c) 4:1
(d) 1:1

Answer: (b) 1:2

Question 40:
You are given four ammeters A, B, C and D having least counts mentioned below:
(I) Ammeter A with least count 0.25 A
(II) Ammeter B with least count 0.5 A
(III) Ammeter C with least count 0.05 A
(IV) Ammeter D with least count 0.1 A

Which of the ammeters would you prefer for doing an experiment to determine the equivalent resistance of two resistances most accurately, when connected in parallel?
(a) Ammeter A
(b) Ammeter B
(c) Ammeter C
(d) Ammeter D

Answer: (c) Ammeter

Question 41:
At a given time, a house is supplied with 100 A at 220 V. How many 75 W, 220 V light bulbs could be switched on in the house at the same time (if they are all connected in parallel)?
(a) 93
(b) 193
(c) 293
(d) 393

Answer: (c) 293

Question 42:
If the current flowing through a fixed resistor is halved, the heat produced in it will become:
(a) One-fourth
(b) One-half
(c) Double
(d) Four times

Answer: (a) One-fourth

Question 43:
Coulomb is the SI unit of:
(a) charge
(b) current
(c) potential difference
(d) resistance

Answer: (a) charge

Question 44:
1 mV is equal to:
(a) 10 volt
(b) 1000 volt
(c) 10^-3 volt
(d) 10^-6 volt

Answer: (c) 10^-3 volt

Question 45:
Electric potential is a:
(a) scalar quantity
(b) vector quantity
(c) neither scalar nor vector
(d) sometimes scalar and sometimes vector

Answer: (a) scalar quantity

Question 46:
100 J of heat is produced each second in a 4Ω resistor. The potential difference across the resistor will be:
(a) 30 V
(b) 10 V
(c) 20 V
(d) 25 V

Answer: (b) 10 V

Question 47:
Which of the following gases are filled in electric bulbs?
(a) Helium and Neon
(b) Neon and Argon
(c) Argon and Hydrogen
(d) Argon and Nitrogen

Answer: (d) Argon and Nitrogen

Question 48:
1 kWh = ……….. J
(a) 3.6 × 10^-6 J
(b) 13.6 × 10⁶ J
(c) 3.6 × 10⁶ J
(d) 13.6 × 10^-6 J

Answer: (c) 3.6 × 10⁶ J

Question 49:
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

Answer: (b) R₂ < R₁

Question 50:
The resistance of hot filament of the bulb is about 10 times the cold resistance. What will be the resistance of 100 W-220 V lamp, when not in use?
(a) 48 Ω
(b) 400 Ω
(c) 484 Ω
(d) 48.4 Ω

Answer: (c) 484 Ω

Question 51:
A coil in the heater consume power P on passing current. If it is cut into halves and joined in parallel, it will consume power
(a) P
(b) \(\frac{P}{2}\)
(c) 2P
(d) 4P

Answer: (d) 4P

Question 52:
A fuse wire repeatedly gets burnt when used with a good heater. It is advised to use a fuse wire of
(a) more length
(b) less radius
(c) less length
(d) more radius

Answer: (d) more radius

Question 53:
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

Answer: (d) 10 A

Question 54:

The effective resistance between A and B is
MCQ Questions for Class 10 Science Electricity with Answers 7
(a) 4Ω
(b) 6Ω
(c) May be 10 Ω
(d) Must be 10 Ω

Answer: (a) 4Ω

Question 55:
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 [NCERT Exemplar Problems]
(a) 10²⁰
(b) 10¹⁶
(c) 10¹⁸
(d) 10²³

Answer: (a) 10²⁰

Question 56:
A car headlight bulb working on a 12 V car battery draws a current of 0.5 A. The resistance of the light bulb is:
(a) 0.5 Ω
(b) 6 Ω
(c) 12 Ω
(d) 24 Ω

Answer: (d) 24 Ω

Question 57:
The other name of potential difference is:
(a) Amphereage
(b) Wattage
(c) Voltage
(d) Potential energy

Answer: (c) Voltage

Question 58:
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

Answer: (b) Half

Question 59:
An electric fuse works on the:
(a) Chemical effect of current
(b) Magnetic effect of current
(v) Lighting effect of current
(d) Heating effect of current

Answer: (d) Heating effect of current

Question 60:
In a filament type light bulb, most of the electric power consumed appears as:
(a) Visible light
(b) Infra-red rays
(c) Ultraviolet rays
(d) Fluorescent light

Answer: (b) Infra-red rays