ECAT Pre Computer Science Chapter 12 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 12 Electrostatics

Try The MCQ's Test For ECAT Physics Chapter 12 Electrostatics

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ECAT Physics Chapter 12 Electrostatics

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Question # 1

Consider a spherical shell of metal at he centre of which a positive point charge is kept

Question # 2

Coulomb's force between two point charges depends upon

Question # 3

An electric charge at rest is

Question # 4

A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?

Question # 5

The charge carriers in electrolyte are positive and negative

Question # 6

The charge per unit time through any cross-section of a conductor is called

Question # 7

Current provided by a battery is maximum when

Question # 8

Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is

Question # 9

Two point charge +3μC and +8μC repel each other with a force of 40 N. If a charge of -5μC is added to each of them, then the force between then will become

Question # 10

The SI unit of permitivity is

Question # 11

One joule is equal to

Question # 12

The charge carriers in gases are

Question # 13

If the distance between the plates of a parallel plate condenser of capacity 10μF is doubled then new capacity will be

Question # 14

When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates

Question # 15

In a voltmeter the conduction takes place due to

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 One joule is equal to
A. 1.6 x 1019eV
B. 6.25 x 1018eV
C. 1.6 x 1818eV
D. 6.25 x 1019eV
2 For two resistance wires joined in parallel, the resultant resistance is 6/5 ohm. When one of the resistance wire breaks, the effective resistance becomes 2 ohm. The resistance of the broken wire is
A. 3/5 ohm
B. 2 ohm
C. 6/5 ohm
D. 3 ohm
3 The statement "the electric force of repulsion or attraction between two point charges is directly proportional to the product of the charges and inversely proportional to square of the distance between them" refer to
A. Coulomb's law
B. Gauss's law
C. Biot-Sarwat law
D. Ampere's law
4 The potential difference across the conductors should be maintained constant by connecting the ends of wire to the terminal of a device called a source of
A. power
B. current
C. resistance
D. temperature
5 Two point charge +3μC and +8μC repel each other with a force of 40 N. If a charge of -5μC is added to each of them, then the force between then will become
A. -10 N
B. +10 N
C. +20 N
D. -20 N
6 Specific resistance of a wire depends upon
A. Length
B. Cross-section area
C. Mass
D. None
7 A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts
A. 1310 W
B. 670 W
C. 810 W
D. 1210 W
8 The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is
A. 10 KJ
B. 5 KJ
C. 2 KJ
D. 1 KJ
9 If the distance of separation between two chares is increased, the electrical potential energy of the system will
A. Increase
B. Decrease
C. May increase or decrease
D. Remain the same
10 Electron volt is the unit of
A. Potential difference
B. Energy
C. Resistance
D. Capacitance

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