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

The unit of conductance is

Question # 2

If two bulbs one of 60 W and other of 100 W are connected in parallel, then which one of the following will flow more?

Question # 3

The graphical representation of ohm's law is

Question # 4

Cause of heat production in a current carrying conductor is

Question # 5

An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be

Question # 6

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

Question # 7

A car battery has e.m.f 12 volt and internal resistance 5 x 10-2ohm. If it draws 60 ampere current, the terminal voltage of the battery will be

Question # 8

If we increase the distance between two plates of the capacitor, the capacitance will

Question # 9

Battery is charged in motor cars, which is based on

Question # 10

One joule is equal to

Question # 11

Electric flux is defined by the relation

Question # 12

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 # 13

The capacitance of a parallel plate capacitor depends upon

Question # 14

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

Question # 15

The nature of capacity of electrostatic capacitor depends on

Question # 16

The current through a metallic conductor is due to the motion of

Question # 17

The electric flux is linked with a surface will be maximum when

Question # 18

The minimum charge on any object can not be less than

Question # 19

The conventional current in a circuit is defined as " current which passes from a point at higher potential to a point at lower potential as if it represent a movement of

Question # 20

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

Question # 21

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

Question # 22

A 10 F capacitor is charged to a potential difference of 50 V and is connected to another uncharged capacitor in parallel. Now the common potential difference becomes 20 volt.The capacitance of second capacitor is

Question # 23

A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes

Question # 24

Surface density of charge is defined as

Question # 25

An alpha particle is accelerated through a potential difference of 106volt. Its kinetic energy will be

Question # 26

One moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is

Question # 27

One coulomb of charge is created by

Question # 28

Which of the following represents an electric current?

Question # 29

The unit of intensity of electric field is

Question # 30

At ordinary temperature, an increase in temperature increases the conductivity of

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The value of electrical constant of proportionality k is
A. 9 x 109Nm2C-2
B. 9 x 10-9Nm2C-2
C. 9 x 1010Nm2C2
D. 9.85 x 10-12N-1C-2
2 A 60 W bulb operates on 220 V supply. The current flowing through the bulb is
A. 11/3 A
B. 3 A
C. 3/11 A
D. 6
3 A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes
A. 2R
B. 4R
C. 16R
D. Zero
4 If 2.2 kilowatt power is transmitted through 1 10 ohm line at 22000 volt, the power loss in the form of heat will be
A. 0.1 watt
B. 1 watt
C. 10 watt
D. 100 watt
5 Battery is charged in motor cars, which is based on
A. Chemical effect
B. Magnetic effect
C. Electric effect
D. None
6 Two conductors having the same type of charges are connected by a conducting wire. There would not be any amount of charges on them if
A. They have the same potential
B. They have the same amount of charge
C. They have the same capacity
D. They have the same shape
7 The ohm's is defined as
A. 1 ampere / 1 volts
B. 1 coulomb / 1 volt
C. 1 volt / 1 ampere
D. 1 volt / 1 coulomb
8 The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10-19N, is
A. 25
B. 225
C. 625
D. 1250
9 A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, then
A. The charge in the plates reduces and potential difference increase
B. Potential difference between the plates increase, stored energy decreases and charge remains the same
C. Potential difference between the plates decreases and charge remains unchanged
D. None of the above
10 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

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