ECAT Pre Engineering Physics Chapter 12 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 12 Electrostatics

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

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Physics ECAT Pre Engineering Chapter 12 Electrostatics

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Question # 1

A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts

Question # 2

Magnetic effect at a point caused due to flow a current depend upon the

Question # 3

If the two charges in Coulomb's law have double distance between them, then electric force

Question # 4

The unit of resistivity is

Question # 5

The SI unit of permitivity is

Question # 6

What is the current is a 2 x 106ohm resistor having a potential difference of 2 x 103volts?

Question # 7

In a Milikian's oil drop experiment the charge on an oil drop is calculated to be 6.35 x 10-19C. The number of excess electrons on the drop is

Question # 8

Ohm's law states that

Question # 9

The colour sequence in a carbon resistor in red, brown, orange and silver. The resistance of the resistor is

Question # 10

In bringing an electron towards another electron, electrostatic potential energy of system

Question # 11

The fractional change in resistance per kelvin is known as

Question # 12

Specific resistance of a wire depends upon

Question # 13

The SI unit of electric flux is

Question # 14

Current provided by a battery is maximum when

Question # 15

The unit of conductance is

Question # 16

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

Question # 17

Potentiometer is more sensitive than voltmeter, because

Question # 18

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10-15 is

Question # 19

A piece of fuse wire melts when a current of 15 ampere flows through it. With this current. If it dissipates 22.5 W, the resistance of fuse wire will be

Question # 20

The concept of field theory was put forward by

Question # 21

If a charged spherical conductor of radius 10 cm has potential V at a point distance 5 cm from its centre, then the potential at a point distance 15 cm from the centre will be

Question # 22

The speed of randomly moving electrons depends upon

Question # 23

A hollow insulated conduction sphere is given a positive charge of 10μC. What will be the electric field at the centre of the sphere if its radius is 2 meters?

Question # 24

The unit of intensity of electric field is

Question # 25

If a 40 watt light bulb burns for 2 hours. how much heat is generated

Question # 26

The substances whose resistance decreases with the increase in temperature these substances have coefficient of

Question # 27

The resistance of a conductor does not depend on its

Question # 28

The SI unit of electric field intensity is

Question # 29

One joule is equal to

Question # 30

When three identical bulbs of 60 watt, 200 volt rating are connected in series to a 200 volt supply, the power drawn by them will be

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
2 Battery is charged in motor cars, which is based on
A. Chemical effect
B. Magnetic effect
C. Electric effect
D. None
3 A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J
A. 5
B. 0.5
C. 0.005
D. 50
4 Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity will be
A. 711μF
B. 611μF
C. 811μF
D. 511μF
5 The force of repulsion between two point charges is F, when these are at a distance 0.1 m apart. Now the point charges are replaced by sphere of radii 5 cm each having the same charge as that of the respective point charges. The distance between their centre is again kept 0.1 m ; then the force of repulsion will
A. Increase
B. Decrease
C. Remain F
D. Become 10F/9
6 Electron volt is the unit of.
A. Potential difference
B. Energy
C. Resistance
D. Capacitance
7 The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as
A. voltmeters
B. resistance
C. electrode
D. current
8 The charge carriers in electrolyte are positive and negative
A. protons
B. electrons
C. ions
D. none of these
9 The conductivity of a superconductor is
A. Infinite
B. Very large
C. Very small
D. Zero
10 If a 40 watt light bulb burns for 2 hours. how much heat is generated
A. 288 x 103J
B. 288 x 108J
C. 288 x 105J
D. 288 x 106J

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