Electricity For Class 10 Physics MCQ Questions

Q 1 – Identify the correct circuit diagram:

 MCQ-Questions For Class-10 Physics Electricity


(a) B
(b) D
(c) C
(d) A

(a) B

Q 2 – A wire of length ‘L’, made of material resistivity ‘ρ’ is cut into two equal parts. The resistivity of the two parts are equal to,

(a) Ρ

(b) P/ 2  

(c) 2p

(d) P2

 (a) P

Q 3 – Insulators have :

(a) No resistance
(b) High resistance
(c) Small resistance
(d) Variable resistance

(b) High resistance

Q 4 – The temperature of a conductor is increased. The graph best showing the variation of its resistance is:

MCQ-Questions For Class-10 Physics Electricity- Resistance curve with the increasing temperature
(a) a
(b) b
(c) c
(d) d

(c) c

Q 5 – A student carries out an experiment and plots the V-I graph of three samples of Nichrome wire with resistances R1 R and R3 respectively. Which of the following is correct?

MCQ-Questions For Class-10 Physics Electricity- Resistance of three samples of Nichrome wire .

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

 (d) R1 < R2 < R3

Q 6 – When electric current is passed, electrons move from:

(a) High potential to low potential
(b) Low potential to high potential
(c) Do not move
(d) Out of the conductor

(a) High potential to low potential

Q 7 – The unit of resistivity is :

(a) V A
(b) V A
(c) V m /A
(d) VA/m

(c) V m /A

Q 8 – In an electric circuit an ammeter is always connected in

(a) Series
(b) parallel
(c) mixed
(d) none of the above

(a) Series

Q 9 – In the experimental verification of Ohm’s law, the function of Rheostat is

(a) To change the voltage across the resistance
(b) To change the current in the circuit
(c) To balance the circuit
(d) To control the circuit

(b) To change the current in the circuit

Q 10 – Resistance of a conductor does not depend on
(a) Length of the conductor
(b) Area of crossection
(c) Density
(d) Resistivity

(c) Density

Q 11 – 1 A is equal to:
(a) 10-3 mA
(b) 10 mA
(c) 103 mA
(d) 10-2 mA

(c) 103 mA

Q 12 – Ohm’s law states that:
(a) Resistance increases as current increases
(b) Resistance decreases as current increases
(c) Resistance increases as voltage increases
(d) Current increases as voltage increases

(d) Current increases as voltage increases

Q 13 – The charge of 1 million protons is
(a) 1.6 × 10-19 C
(b) 1.6 × 10-19 C
(c) 1.6 × 10-13 C
(d) 1.6 × 1019 C

(c) 1.6 × 10-13 C

Q 14 – If I is the current flowing through a conductor for time t and e be the charge of electron, then the number of electrons transferred is

(a) Ite                   

(b) It/e

(c) Ie/t

(d) et/I

(b) It/e

Q 15 – The resistance of a hollow cylinder of copper of length 10 m and inner and outer radii 2cm and 3 cm respectively is (ρ copper = 2 ×10-8 Ω m):

(a) 2/ π × 10-3 Ω

(b) 2/5 π ×  10-3 Ω

(c) 2/5 ×  10-3 Ω

(d) None of the above

(b) 2/5 π × 10-3 Ω

Q 16 – True test of charge is

(a) Attraction only

(b) Repulsion only

(c) Both attraction and repulsion

(d) None of the above

(b) Repulsion only

Q 17 – The condition when the resistance of a circuit is zero is known as

(a) Closed-circuit

(b) Open circuit

(c) Short circuit

(d) Zero circuit

(c) Short circuit

Q 18 – Ohm’s law is applicable to

(a) Semiconductors

(b) Vacuum tubes

(c) Carbon resistors

(d) None of these

(d) None of these

Q 19 – The condition for the validity of Ohm’s law is that the

(a) Temperature should remain constant

(b) Current should be proportional to voltage

(c) Resistance must be wire wound type

(d) All of the above

.

(a) Temperature should remain constant

Q 20 – Ohm’s law is not applicable to

(a) Semiconductors

(b) D.C. circuits

(c) Small resistors

(d) High currents

(a) Semiconductors

Q 21 –  Correct form of ohm’s law

a. I = VR

b. V ∝ I

c. V = IR

d. Above B and C

d. Above B and C

Q 22 – Ohm’s law in point form in field theory can be expressed as

a. V = RI

b. J = E/σ

c. J = σE

d. R = ρl/A

c. J = σE

Q 23 – One horsepower (hp) is equivalent to ____.

a. 720 watt

b. 746 watt

c. 650 watt

d. 310 watt

b. 746 watt

Q 24 – Electric current is measured in ____.

a. farad

b. ohm

c. coulomb

d. ampere

 d. ampere

Q 25 – Terminal voltage is drawn from a cell when the circuit containing the cell is open. True/ False

True

Q 26 – Conventional current flows from lower potential to higher potential. True/ False

False

Q 27 – An electric fuse is based on magnetic effects of electric current. True / False

False

Q 28 – The resistivity of a copper wire is infinitely large. True / False

 False

Q 29 – Two resistances of 6 Ω and 12 Ω are connected in parallel. Their net resistance is ____.

a. 7Ω
b. 6 Ω
c. 4 Ω
d. 5 Ω

c. 4 Ω

Q 30 – The commercial unit of electric energy is ____.

a. horse power
b. joule/hour
c. kilowatt hour
d. mega-watt hour

 c. kilowatt-hour

Q 31 – A parallel combination of resistors is used to obtain a ____.

a. smaller resistance
b. low voltage
c. high resistance
d. high voltage

a. smaller resistance

Q 32 – Few resistors are connected in series to a battery and formed a closed electric circuit, then the current through each resistor in the closed electric circuit is the same. True/ False

True

Q 33 – Resistance offered by the conductors does not depend on ____ of the conductor.

a. length
b. area of cross-section
c. temperature
d. surface area

d. Surface area

Q 34 – If the total charge ‘Q’ is flowing through a wire for a time of ‘t’ seconds, then the current ‘I’ can be represented as _____________.

a. I = t/Q

b. I = F/t

c. I = T/f

d. I = Q/t

d. I = Q/t

Q 35 – When ‘n’ identical resistors of resistance ‘R’ are connected in series, the resultant resistance is _____________.

a. R

b. nR/2

c. nR

d. R/n

Q 36 – Watt-hour is called as ____________.

a. one coulomb

b. one horsepower

c. one-volt hour

d. one volt-ampere hour

d. one volt-ampere hour.

Q 37 – According to Ohm’s law, the electric current in a conductor is equal to the voltage across its endsTrue / False

 True.

Q 38 – In a closed electric circuit, the voltmeter should be connected in series in the circuit. True / False

False.

Q 39 – Which of the following is the purpose of connecting a battery in an electric circuit?

a. To maintain resistance across the conductor.
b. To vary resistance across the conductors.
c. To maintain constant potential difference across the conductor.
d. To maintain varying potential difference across the conductor.

 c. To maintain constant potential difference across the conductor.

Q 40 – If a man has ten 0.1 Ω resistors, then ____ is the smallest resistance he can obtain by using them.

a. 100 Ω
b. 0.01 Ω
c. 1 Ω
d. 0.1 Ω

b. 0.01 Ω

Q 41 – A current is flowing through a wire. Then the nature of the wire is _____________.

a. positively charged
b. neutral
c. partially charged
d. negatively charged

 b. neutral

Q 42 – Copper is not preferred to make fuse wire because it _____________.

a. is a good conductor of electricity
b. has a low melting point
c. has a high melting point
d. is not easily available

c. has high melting point

Q 43 – While a cell is being charged, ______________ energy is converted into ___________ energy.

a. mechanical, electrical
b. electrical, chemical
c. heat, electrical
d. chemical, heat

 b. electrical, chemical

Q 44 – A closed path through which the charge continuously moves is known as a closed circuit. True/ False

 True

Q 45 – Two bulbs A and B are connected in series with a cell. Resistance of bulb A is Ra and resistance of bulb B is Rb. The ratio of the currents in bulb A to bulb B is ______________.

a. Ra: Rb

b. 1 : 1

c. Rb : Ra

d. Data insufficient

b. 1 : 1

Q 46 – The property of a body to oppose the flow of electric charge through it is called electric ________________.

a. capacitance
b. potential
c. resistance
d. conductance

 c. resistance

Q 47 – Ammeter is a device that is used to measure ________________.

a. electric current

b. electric potential

c. electric resistance

d. capacitance

a. electric current

Q 48 – When 2 identical resistors of resistance 10 Ω are connected in parallel, the resultant resistance is ________________ Ω.

a. 20 Ω

b. 10 Ω

c. 5 Ω

d. 15 Ω

 5 Ω

Q 49 – Electric current is defined as the rate of flow of ________________.

a. energy

b. power

c. charge

d. mass

 c. charge

Q 50 – In a wire current flow is kept continuous by maintaining a potential difference between the ends of the wire. True/ False

True

Q 51 – The resistance of a hot filament is less than the resistance of a cold filament. True/ False

 False

Q 52 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. voltage

Q 53. To get 2 Ω resistance using only 6 Ω resistors, the number of them required is
a. 2
b. 3
c. 4
d. 6

 b. 3

Q 54. 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

d. more radius

Q 55. 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

d. Double

Q 56. 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

One-fourth

Q 57. 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. the shape of the resistor is changed

Q 58. Unit of electric power may also be expressed as
a. volt-ampere

b. kilowatt hour

c. watt second

d. Joule second

a. volt-ampere

Q 59. The electrical resistivity of a given metallic wire depends upon
a. its length
b. its thickness
c. its shape
d. nature of the material

 d. nature of the material

Q 60. The unit of e.m.f. of a cell is
a. dyne
b. volt
c. ampere
d. joule

b. volt

Q 61. Kilowatt-hour is the unit of
a. power
b. energy
c. impulsed. force

 b. energy

a. free electrons

Q 63. Two resistors of resistance 2 and 4 when connected to a battery will have

(a) same current flowing through them when connected in parallel
(b) same current flowing through them when connected in series
(c) same potential difference across them when connected in series
(d) different potential difference across them when connected in parallel

(b) same current flowing through them when connected in series

Q 64. By using only two resistors, R1 and R2, a student is able to obtain resistances of 3, 4, 12, and 16. The values of R1 and R2 (in ohms) are:
(a) 3, 4

(b) 2, 12

(c) 3, 16

(d) 4, 12

 (d) 4, 12

Q 65. Three equal resistances, when combined in series, are equivalent to 90 Ω. Their equivalent resistance when combined in parallel will be _________________.
(a) 270 Ω

(b) 30 Ω

(c) 810 Ω

(d) 10 Ω

(d) 10 Ω

Q 66. The total resistance of 3 resistors, each of 3 Ω, connected in parallel will be :

(a) 9 Ω

(b) 1 Ω

(c) 3 Ω

(d) 1/3 Ω

(b) 1 Ω

Q 67. A wire of resistance R is cut into n equal parts. These parts are then connected in parallel. The equivalent resistance of the combination will be
(a) n R

(b) R/n

(c) n/R

(d) R/n2

(d) R/n2

MCQ-Questions For Class-10 Physics Electricity- N no. of resistors in parallel by cbseinsights.com

Q 68. The resistance of resistor 1 is twice the resistance of resistor 2. Then two are connected in parallel and a potential difference is maintained across the combination. Then:

(a) the current in resistor 1 is twice that in resistor 2
(b) the current in resistor
 1 is half that in resistor 2
(c) the potential difference across resistor
 1 is twice that across resistor 2
(d) the potential difference across resistor
 1 is half that across.

(b) the current in resistor 1 is half that in resistor 2.

Q 69. 1 µA is equivalent to how many Ampere?

(A) 103A

(B) 106 A

(C) 10–3 A

(D) 10–6 A

(D) 10–6 A

Q 70. Which of the following works on the heating effect of electricity?

(A) Electrical Iron

(B) Tube Light

(C) T.V

(D) Electric Bell

(A) Electrical Iron