# 100+ Electricity Class 10 MCQ and Answers with FREE PDF

These Electricity Class 10 MCQ and Answers are most important part of your NCERT Class 10 Science Text Book. These Electricity Class 10 MCQ and Answers with FREE PDF will help you the most.

## Electricity Class 10 MCQ and Answers

(a) 2 A

(b) 4 A

(c) 8 A

(d) 16 A

(a) 2

(b) 3

(c) 4

(d) 6

#### 3. 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

a) < 100 ?

(b) < 4 ?

(c) < 1 ?

(d) > 2 ?

(a) each of 5 ?

(b) 6 ? and 4 ?

(c) 7 ? and 4 ?

(d) 8 ? and 2 ?

(a) R1 < R2

(b) R2 < R1

(c) R1 = R2

(d) R1 ? R2

(a) 48 ?

(b) 400 ?

(c) 484 ?

(d) 48.4 ?

(a) more length

(c) less length

(a) 2.5 A

(b) 5.0 A

(c) 7.5 A

(d) 10 A

(a) 1020

(b) 1016

(c) 1018

(d) 1023

(a) 1/5 ?

(b) 10 ?

(c) 5 ?

(d) 1 ?

(a) A/2

(b) 3A/2

(c) 2A

(d) 3A

(a) 100%

(b) 200%

(c) 300 %

(d) 400 %

#### 14. 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

(a) 5 J

(b) 10 J

(c) 20 J

(d) 30 J

#### 16. Electric potential is a:

(a) scalar quantity

(b) vector quantity

(c) neither scalar nor vector

(d) sometimes scalar and sometimes vector

(a) 10 volt

(b) 1000 volt

(c) 10-3 volt

(d) 10-6 volt

#### 18. Electricity MCQ Question 30. Coulomb is the SI unit of:

(a) charge

(b) current

(c) potential difference

(d) resistance

#### 19. 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.

(a) copper

(b) nichrome

(c) aluminium

(d) iron

#### 21. The electrical resistance of insulators is

(a) high

(b) low

(c) zero

(d) infinitely high

#### 22. Electrical resistivity of any given metallic wire depends upon

(a) its thickness

(b) its shape

(c) nature of the material

(d) its length

(a) resistance

(b) voltage

(c) current

(d) temperature

#### 24. What is the commercial unit of electrical energy?

(a) Joules

(b) Kilojoules

(c) Kilowatt-hour

(d) Watt-hour

#### 25. Three resistors of 1 ?, 2 ft and 3 ? are connected in parallel. The combined resistance of the three resistors should be

(a) greater than 3 ?

(b) less than 1 ?

(c) equal to 2 ?

(d) between 1 ? and 3 ?

(a) 440 W

(b) 110 W

(c) 55 W

(d) 0.0023 W

(a) 10-8 ?-m

(b) 101 ?-m

(c) 10-6 ?-m

(d) 106 ?-m

#### 28. 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

(a) 30 V

(b) 10 V

(c) 20 V

(d) 25 V

#### 30. Which of these is a correct definition of conventional current?

a) Current that flows from lower potential to higher potential

b) The current which remains static

c) Current constituted by the flow of ions

d) Current that flows from higher potential to lower potential

#### 31. Which type of current is flowing through a circuit?

a) Static current

b) Conventional current

c) Electronic current

d) Potential current

a) [M L T-2]

b) [M0 L0 T0 A1]

c) [M L3 T0]

d) [M L2 T-3]

#### 33. Which type of a physical quantity is electric current?

a) Scalar quantity

b) Vector quantity

c) Bipolar quantity

d) Thermodynamic quantity

#### 34. Which of these is a correct definition of electronic current?

a) Current that flows from lower potential to higher potential

b) The current which remains static

c) Current constituted by the flow of ions

d) Current that flows from higher potential to lower potential

#### 35. What is the study of electric charges in motion called?

a) Charge mobility

b) Electronic mobility

c) Static electricity

d) Current electricity

a) Coulomb (C)

b) Ampere (A)

d) Newton (N)

a) 2.25 × 1018

b) 2.25 × 10-18

c) 6.25 × 1018

d) 6.25 × 10-18

a) 1.875 × 1020

b) 6.875 × 1020

c) 1.875 × 10-20

d) 6.875 × 10-20

#### 39. Which of the following statement is true?

(a) Electrostatic force is a conservative force.

(b) Potential at a point is the work done per unit charge in bringing a charge from any point to infinity.

(c) Electrostatic force is non-conservative

(d) Potential is the productof charge and work.

#### 40. Consider a uniform electric field in the z-direction. The potential is a constant

(a) for any x for a given z

(b) for any y for a given z

(c) on the x-y plane for a given z

(d) all of these

#### 41. Equipotential surfaces

(a) are closer in regions of large electric fields compared to regions of lower electric fields.

(b) will be more crowded near sharp edges of a conductor.

(c) will always be equally spaced.

(d) both (a) and (b) are correct.

#### 42. In a region of constant potential

(a) the electric field is uniform.

(b) the electric field is zero.

(c) there can be no charge inside the region.

(d) both (b) and (c) are correct.

#### 43. A test charge is moved from lower potential point to a higher potential point. The potential energy of test charge will

(a) remain the same

(b) increase

(c) decrease

(d) become zero

#### 44. If a conductor has a potential V ? 0 and there are no charges anywhere else outside, then

(a) there must be charges on the surface or in¬side itself.

(b) there cannot be any charge in the body of the conductor.

(c) there must be charges only on the surface.

(d) both (a) and (b) are correct.

#### 45. Which of the following statements is false for a perfect conductor?

(a) The surface of the conductor is an equipoten-tial surface.

(b) The electric field just outside the surface of a conductor is perpendicular to the surface.

(c) The charge carried by a conductor is always uniformly distributed over the surface of the conductor.

(d) None of these.

(a) zero

(b) infinite

(c) 1

(d) 10

#### 47. When air is replaced by a dielectric medium of constant K, the maximum force of attraction between two charges separated by a distance

(a) increases K times

(b) remains unchanged

(c) decreases K times

(d) increases K-1 times

#### 48. In a parallel plate capacitor, the capacity increases if

(a) area of the plate is decreased.

(b) distance between the plates increases.

(c) area of the plate is increased.

(d) dielectric constantly decreases.

#### 49. A parallel plate air capacitor is charged to a potential difference of V volts. After disconnecting the charging battery the distance between the plates of the capacitor is increased using an insulating handle. As a result the potential difference between the plates

(a) increases

(b) decreases

(c) does not change

(d) becomes zero

#### 50. Two identical capacitors are joined in parallel, charged to a potential V, separated and then connected in series, the positive plate of one is connected to the negative of the other. Which of the following is true?

(a) The charges on the free plated connected to-gether are destroyed.

(b) The energy stored in ths system increases.

(c) The potential difference between the free plates is 2V.

(d) The potential difference remains constant.

#### 51. A capacitor has some dielectric between its plates, and the capacitor is connected to a dc source. The battery is now disconnected and then the dielectric is removed, then

(a) capacitance will increase.

(b) energy stored will decrease.

(c) electric field will increase.

(d) voltage will decrease.

#### 52. Amount of work done in bringing a unit positive charge from one end to another end of conductor is called as

a) resistance

b) electric current

c) potential difference

d) power

a) one erg

b) one calorie

c)one watt

d) one joule

a) volt

b) ampere

c)watt

d) joule

a) 2 A

b) 3 A

c)4 A

d) 5 A

a) 100 J

b) 150 J

c)200 J

d) 250 J

a) 11 C

b) 12 C

c)13 C

d) 14 C

a) 1.2× 102 J

b) 1.2× 103 J

c) 1.2 × 104 J

d) 1.2 × 104 J

a) 1.5 A

b) 1.7 A

c) 1.9 A

d) 2.1 A

a) 50 V

b) 40 V

c) 30 V

d) 30 V

a) 1.00 × 1019

b) 1.75 × 1019

c) 1.25 × 1019

d) 1.50 × 1019

a) parallel

b) series

c) both a and b

d) none of these

a) 1× 108 joule

b) 2× 108 joule

c) 3 × 108 joule

d) 4× 108 joule

#### 64. Which of the following physical conditions of conductor should be kept constant to verify Ohm’s law for the given conductor

a) length

b) area of cross-section

c) temperature

d) all of these

a) 1 kV

b) 10 kV

c) 2 kV

d) 20 kV

#### 66. Ohm’s law does not hold good for……

a) DC circuit

b) high resistances

c) small potential differences

d) semiconductor

#### 67. The graph of potential difference vs electric current for ohmic conductor is

a) Straight line passing through origin

b) exponentially decreasing curve

c) Exponentially decreasing curve

d) straight line intercepting at Y-axis.

#### 68. The current wave shape is in the form of a square terminating at t = 4sec. The voltage across the element increases linearly till t = 4 sec and then becomes constant. The element is ____________

a) Resistance

b) Inductance

c) Capacitance

d) Semi-conductor

#### 69. The source of supply of an electrical circuit is:

(a) always an AC network

(b) where the energy comes from

(c) the part of the circuit where the current does not flow

(d) the section where the energy is consumed

(b) battery

(c) circuit

(d) supply

#### 71. The load of an electrical circuit is the part that:

(a) supplies the energy for the circuit

(b) conducts the current to the working device

(c) converts electricity into some form of work

(d) must always be connected a short circuit

#### 72. An electrical circuit needs a conductor to:

(a) act as the circuit load

(b) provide the energy for the circuit

(c) ensure that a short circuit cannot occur

(d) carry the current to the load

#### 73. Switches control current flow within a circuit. When a circuit is open:

(a) no current flows

(b) maximum current flows

(c) short-circuit current flow

(d) the supply is connected to the load

a) y/3

b) 3y

c) 6y

d) y/6

a) 10 J/C

b) 10 V/C

c) 10C/sec

d) 10 W/sec

#### 76. Consider a circuit with two unequal resistances in parallel, then ___________

a) large current flows in large resistor

b) current is same in both

c) potential difference across each is same

d) smaller resistance has smaller conductance

#### 77. In which of the following cases is Ohm’s law not applicable?

a) Electrolytes

b) Arc lamps

c) Insulators

d) Vacuum ratio values

a) V/16

b) 16V

c) V

d) V/4

a) 220V, 60W

b) 220V,100W

c) 115V,60W

d) 115V,100 W

#### 80. Ohm’s law is not applicable to ___________

a) dc circuits

b) high currents

c) small resistors

d) semi-conductors

a) mho

b) mho/m

c) ohm/m

d) m/ohm

#### 82. Resistivity of a wire depends on ___________

a) length of wire

b) cross section area

c) material

d) all of the mentioned

a) conductance

b) resistance

c) resistivity

d) a constant

#### 84. In series connection of resistors, what happens to the current across each resistor?

a) Increases

b) Decreases

c) Remain the same

d) Initially increases and then decreases

#### 85. Identify the combination which is not a series connection.

a) Resistance box

b) Decorative bulbs

c) Fuses

d) Domestic appliances

#### 86. Pick out the correct statement from the following about parallel combination of resistors.

a) The current across the resistors are the same

b) The resistance offered by all resistors are the same

c) The potential difference is same across each resistor

d) The equivalent overall resistance is larger than the largest resistor

a) 40

b) 12

c) 32

d) 20

a) 1:3

b) 3:1

c) 1:2

d) 2:1

a) 30

b) 20

c) 35

d) 45

#### 90. Which of the following two main categories of resistor?

(a) Permanent & changeable

(b) Low ohmic as well as high ohmic value

(c) Commercial as well as Industrial

(d) Low power and high power value

(a) 1

(b) 3

(c) 5

(d) 7

#### 92. The Power can be defined as

(a) Energy

(b) The charge at which energy is utilized

(c) Watts

(d) The charge at which energy is produced

(a) Aluminum

(b) Gold

(c) Silver

(d) Copper

#### 94. By using Ohm’s law, the resistance is not changing means that voltage as well as current is

(a) Directly proportional

(b) The same

(c) Not capable to generate energy

(d) Inversely proportional

(a) 26 kilohms

(b) 33000 ohms

(c) 2200 ohms

(d) 33 kilohms

#### 96. The power can be calculated in units of…?

(a) Joules * charge

(b) Joules per work

(c) Joules per time

(d) Joules * voltage

#### 97. Which of the following step is most important while calculating resistors?

(a) Utilize the maximum potential scale

(b) Keep test terminals short

(c) keep the meter reading zero before using

(d) Take away power from the circuit

#### 98. Which of the following component can be designed for opposing the flow of current is named as?

(a) Insulators

(b) Resistors

(c) Conductors

(d) Heat exchangers

#### 99. What kind of resistors have a 5% of tolerance rating otherwise better?

(a) General-purpose

(b) SIP

(c) Precision

(d) Wire wound

#### 100. The tolerance of Resistor can be either printed on top of the component, otherwise can be provided by

(a) Keyed containers

(b) Color code

(c) Size

#### 101. When the load resistance rises, then what will be the load current?

(a) Vary

(b) Decrease

(c) Increase

(d) Remain Constant

(a) Voltmeter

(b) Ammeter

(c) Ohmmeter

(d) Wattmeter

#### 103. Whenever resistance reduces then what will be the current?

(a) Increase

(b) Remain the same

(c) Decrease

(d) Double

#### 104. Which of the following property will have a good fuse

(a) A medium resistance

(b) An infinite resistance

(c) Zero ohms resistance

(d) A high resistance

#### 105. Which of the following property will have the wire wound resistor

(a) Low power

(b) High power

(c) High current

(d) Negative temperature coefficients