# MCQ Chapter 12 Electricity Class 10 Science

Please refer to Electricity MCQ Questions Class 10 Science below. These MCQ questions for Class 10 Science with answers have been designed as per the latest NCERT, CBSE books, and syllabus issued for the current academic year. These objective questions for Electricity will help you to prepare for the exams and get more marks.

## Electricity MCQ Questions Class 10 Science

Please see solved MCQ Questions for Electricity in Class 10 Science. All questions and answers have been prepared by expert faculty of standard 10 based on the latest examination guidelines.

### MCQ Questions Class 10 Science Electricity

Question: Three resistances of 4Ω, 5 Ω and 20 Ω are connected in parallel. Their combined resistance is
(a) 2 Ω
(b) 4 Ω
(c) 5 Ω
(d) 20 Ω

A

Question: Three resistors of resistances R1, R2 and R3 are connected in series. If I is the current passing through R1
(a) 1:1
(b) 1:2
(c) 1:3
(d) 1:4

A

Question: The direction of electric current is taken as _______________ to the direction of the flow of electrons.
(a) Same
(b) Opposite
(c) Both
(d) None

B

Question: Three resistances of 1 Ω each are connected to form a triangle. The resistance between any two terminals is
(a) 3 Ω
(b) 1/2 Ω
(c) 2/3 Ω
(d) 3/2 Ω

C

Question: How is fuse connected to the electric device?
(a) Series
(b) Parallel
(c) Both
(d) None

A

Question: State which of the following is correct?
(a) Joule = Coulomb x volt
(b) Joule = Coulomb/volt
(c) Joule = Volt/ampere
(d) Joule = ampere/volt

A

Question: What is the current rating for the circuit used for bulbs, fans, etc?
(a) 5 A
(b) 10 A
(c) 15 A
(d) 20 A

A

Question: When a current of I ampere is passed through a resistor of R ohm for t seconds, then the amount of heat produced is
(a) H = I2Rt Cal
(b) H = I2Rt Kcal
(c) H = I2Rt joule
(d) H = I2Rt/4.18 joule

C

Question: Which electrical component protects from short circuiting?
(a) Fuse
(b) Resistor
(c) Electric plug
(d) Switch

A

Question: Electric power is given by
(a) P = V/I
(b) P = I/V
(c) P = I/VI
(d) P = VI

D

Question: A _______________ consists of a piece of wire made of metal or an alloy (37% lead, 63% tin).
(a) Fuse
(b) Resistor
(c) Electric plug
(d) Switch

A

Question: The practical unit of electrical energy
(a) Watt
(b) Kilowatt
(c) Kilowatt hour
(d) Kilo Joule

C

Question: The SI unit of electric power is
(a) Coulomb
(b) Ampere
(c) Joule
(d) Watt

D

Question: How many joules are there in 1 kilowatt hour?
(a) 3.6 x 103
(b) 3.6 x 104
(c) 3.6 x 105
(d) 3.6 x 106

D

Question: A smell heating element connected to a 10 V battery draws a current of 5 A. How much electric power is supplied to the heater?
(a) 15 W
(b) 25 W
(c) 2 W
(d) 50 W

D

Question: Watt is the unit of
(a) Electric current
(b) Electric energy
(c) Electric power
(d) Potential difference

C

Question: Kilowatt hour is the unit of
(a) Electric power
(b) Electric resistance
(c) Electric potential
(d) Electric energy

D

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

D

Question: Identify the circuit, the diagrams given below, in which the electrical components have been properly connected

(a) (i)
(b) (ii)
(c) (iii)
(d) (iv)

B

Question: A cell, a resistor, a key and an ammeter are arranged as shown in the circuit diagrams. The current recorded in the ammeter will be:

(a) maximum in (i)
(b) maximum in (ii)
(c) maximum in (iii)
(d) the same in all the cases

D

Question: The proper representation of series combination of cells, for obtaining maximum potential is

(a) (i)
(b) (ii)
(c) (iii)
(d) (iv)

A

Question: In the following circuits, heat produced in the resistor or combination of resistors connected to a 12 V battery will be:

(a) same in all cases
(b) minimum in case (i)
(c) maximum in case (ii)
(d) maximum in case (iii)

D

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) 1010
(c) 1018
(d) 1023

A

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

A

Question: What is the maximum resistance which can be made using five resistors each of (1/5) Ω?
(a) (1/5) Ω
(b) 10 Ω
(c) 5 Ω
(d) 1 Ω

D

Question: What is the minimum resistance which can be made using five resistors each of (1/5) Ω?
(a) (1/5) Ω
(b) (1/25) Ω
(c) (1/10) Ω
(d) 25 Ω

B

Question: If the current I through a resistor is increased by 100% (assume that temperature remains unchanged),the increase in power dissipated will be:
(a) 100%
(b) 200%
(c) 300%
(d) 400%

C

Question: A student carries out an experiment and plots the V-I graphs of three samples of nichrome wire with resistances R1, R2 and R3 respectively. Which of the following is true?

(a) R1= R2 = R3
(b) R1 > R2 > R
(c) R3 > R2 > R1
(d) R2 > R3 > R1

C

Question: The resistivity does not change if:
(a) the material is changed
(b) the temperature is changed
(c) the shape of the resistor is changed
(d) both material and temperature are changed

C

Question. A piece of wire of resistance R is cut into five equal parts. These parts are then connected in parallel. If the equivalent resistance of this combination isRl, then the ratio R/Rl is
(a) 1/25
(b) 1/5
(c) 5
(d) 25

D

Question. Two bulbs have the following ratings:
1. 40 Ω, 220 V
2. 20 Ω, 100 V
The ratio of their resistance is
(a) 1: 2
(b) 2 :1
(c) 1:1
(d) 1: 3

B

Question. A letter A is constructed of a uniform wire of resistance 1 ohm per cm. The sides of the letter are 20 cm and the cross piece in the middle is 10 cm long.
The resistance between the ends of the legs will be
(a) 32.4 ohm
(b) 28.7 ohm
(c) 26.7 ohm
(d) 24.7 ohm

C

Question. The current flowing through a wire of resistance 2 Ω varies with time as shown in figure alongside. The amount of heat produced (in J) in 3 s would be

(a) 2 J
(b) 18 J
(c) 28 J
(d) 10 J

C

Question. 20 coulomb charge is flowing in 0.5 second from a point in an electric circuit then value of electric current in amperes will be
(a) 10
(b) 40
(c) 0.005
(d) 0.05

B

Question. A wire of resistance R is cut into ten equal parts which are then joined in parallel. The new resistance is
(a) 0.01 R
(b) 0.1 R
(c) 10 R
(d) 100 R

A

Question. A current of 4.8 A is flowing in a conductor. The number of electrons passing per second through the conductor will be
(a) 3×1020
(b) 76.8×1020
(c) 7.68×10-19
(d) 3×1019

D

Question. What is the current through a 5.0 ohm resistor if the voltage across it is 10 V
(a) zero
(b) 0.5 A
(c) 2.0 A
(d) 5.0 A

C

Question. The length of a wire is doubled. By what factor does the resistance change
(a) 4 time as large
(b) twice as large
(c) unchanged
(d) half as large

D

Question. How much work is done in moving a charge of 2 C from a point of 118 V to a point of 128 V?
(a) 20 J
(b) 30 J
(c) 40 J
(d) 10 J

A

Question. A 24 V potential difference is applied is applied across a parallel combination of four 6 ohm resistor. The current in each resistor is
(a) 1 A
(b) 4 A
(c) 16 A
(d) 36 A

B

Question. 100 J of heat is produced each second in a 4 Ω resistance. The potential difference across the resistor is
(a) 20 V
(b) 10 V
(c) 5 V
(d) 15 V

A

Question. Two unequal resistances are connected in parallel.
Which of the following statement is true
(a) current in same in both
(b) current is larger in higher resistance
(c) voltage-drop is same across both
(d) voltage-drop is lower in lower resistance

C

Question. A cylindrical rod is reformed to twice its length with no change in its volume. If the resistance of the rod was R, the new resistance will be
(a) R
(b) 2R
(c) 4R
(d) 8R

C

Question:  A cylindrical conductor of length l and uniform area of cross-section A has resistance R. Anotherconductor of length 2 l and resistance R of the same material has area of cross-section:
(a) A/2
(b) 3 A/2
(c) 2 A
(d) 3 A

C

Assertion And Reason Based Questions :

(a) Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
(b) Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
(c) Assertion (A) is true but reason (R) is false.
(d) Assertion (A) is false but reason (R) is true.
(e) Both Assertion and Reason are false.

Question. Assertion : If r 1 and r 2 be the resistivity of the materials of two resistors of resistances R1 and R2 respectively and R1 > R2 .
Reason : The resistance R = P,1/A ⇒ r1 > r2 if R1 > R2

C

Question. Assertion : Copper is used to make electric wires.
Reason : Copper has very low electrical resistance.

A

Question. Assertion : Silver is not used to make electric wires.
Reason : Silver is a bad conductor.

C

Question. Assertion : Wire A is thin in comparison to wire B of same material same length then resistance of wire A is greater than resistance of wire B.
Reason : Resistivity of wire A is greater than resistance of wire B.

C

Question. Assertion : A voltmeter and ammeter can be used together to measure resistance but not power.
Reason : Power is proportional to voltage and current.

E

Question. Assertion : A resistor of resistance R is connected to an ideal battery. If the value of R is decreased, the power dissipated in the circuit will increase.
Reason : The power dissipated in the circuit is directly proportional to the resistance of the circuit.

C

Question. Assertion : The 200 W bulbs glow with more brightness than 100 W bulbs.
Reason : A 100 W bulb has more resistance than 200 W bulb.

A

Question. Assertion : The resistivity of conductor increases with the increasing of temperature.
Reason : The resistivity is the reciprocal of the conductivity.

B

Question. Assertion : If a graph is plotted between the potential difference and the current flowing, the graph is a straight line passing through the origin.
Reason : The current is directly proportional to the potential difference.

A

Question. Assertion : The equation V = Ri does not apply to those conducting. devices which do not obey Ohm’s law.
Reason : V = RI is a statement of Ohm’s law.

C

Fill in the Blanks :

Question. ………….. is a property that resists the flow of electrons in a conductor.

Resistance

Question. The S.I. unit of resistance is ……………..

ohm (Ω)

Question. The potential difference across the ends of a resistor is …………… to the current through it, provided its ……………….. remains the same.

directly proportional, temperature

Question. The resistance of a conductor depends directly on its …………., inversely on its …………….., and also directly proportioned on the ………….. of the conductor.

length, area of cross-section, resistivity

Question. 1 volt × 1 coulomb = …………..

joule

Question. If there is no current, a voltmeter connected across a resistor will register………………… voltage.

zero

Question. Electrical power = (Potential difference)2/……….

Cresistance

Question. Electric energy is produced by the …….. of charges.

Separation

Question. Physical quantity represented by coulomb per second is ………. .

Electric current

Question. A fuse is connected in ………. to the ………. wire.

Series, live

Question. The alloy which is used for making the filament of bulbs is ………

Tungsten

Question. Power transmission is carried out at high ………. and low …….. .

Voltage, current

Question. Rate at which electric work is done is called ………

Electric power

Question. Copper is a preferred material for making wire because of its low ……….

Resistivity

Question. The electrical energy dissipated in a resistor is given by W = ……….

VxI xt

Question. The ………. reaction within the cell generates the potential difference between its two terminals that sets the ………. in motion to flow the current through a resistor.

chemical

Question. The resistance of a semiconductor …….. with increase in temp.

decreases

True / False :

Question. One kilowatt is equal to 10 horse power.

False

Question. The reciprocal of resistance is called specific

False

Question. The sun is visible two minutes before the actual sunrise due to atmospheric refraction.

True

Question. The focal length of a given lens depends on the surrounding medium.

True

Question. The resistivity of a wire is directly proportional to cross-sectional area.

True

Question. One kilowatt is equal to 10 horse power.

False

Question. The solar spectrum in general is an absorption spectrum.

False

Question. Ohm’s law is a relation between the power used in a circuit to the current and the potential difference.

False

Question. When a metallic conductor is heated the atoms in the metal vibrate with greater amplitude and frequency.

True

Question. The resistivity of all pure metals increases with the rise in temperature.

True

Question. In parallel combination, the reciprocal of equivalent resistance is the sum of the reciprocal of individual resistance.

True

Question. The resistance of a wire is directly proportional to area.

False

Question. When a metallic conductor is heated the atoms in the metal vibrate with greater amplitude and frequency.

True

Question. In parallel combination, the reciprocal of equivalent resistance is the sum of the reciprocal of individual resistance.

True

Question. The quantity of charge flowing through a point multiplied by time is a current.

False

Question. The resistance of a wire is directly proportional to length.

True

Match the Following :

Question. Column II gives name of material use for device given i column I

A-q, B-r, C-p, D-s

Question.

1-(c), 2-(d), 3-(a), 4-(b)

Question.

(a) A-p, B-p, C-s, q, D-r

Question.

(b) A-p, B-q, r, C-q, D-s

Question. For the circuit shown in the adjoining figure, match the entries of column I with the entries of column II.

(a) A-q, B-r, C-p, s, D-s

Question.

(a) A-q, s, B-p, C-q, s D-r

Question. In the figure shown, the value of each resistance is R. match the entries of column I with the entries of column II.

A-q, B-p, C , D: r

Question. Consider a network of resistances each of value of R as shown in figure.

(a) A-r, B-q, C-p, D-t

Question. Match the Following

A-q, B-p, C-s, D-r

Question.