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 cube of metal is given a positive charge Q. For the above system, which of the following statements is true?

Question # 2

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

Question # 3

The unit of intensity of electric field is

Question # 4

A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy

Question # 5

In a charged capacitor the energy is stored in

Question # 6

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

Question # 7

The electrode connected with the positive terminal of the current source is called

Question # 8

The ratio of the gravitational force Fgto the electrostatic force Febetween two electrons at the same distance apart is approximately

Question # 9

The charge carriers in gases are

Question # 10

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

Question # 11

A certain charge liberates 0.8 g of oxygen. The same charge will liberate. how many g of silver?

Question # 12

The resistance of a conductor does not depend on its

Question # 13

Which of the following represents an electric current?

Question # 14

A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J

Question # 15

A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor

Question # 16

Battery is charged in motor cars, which is based on

Question # 17

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

Question # 18

A uniform resistance wire of Length L and diameter d has a resistance R. Another wire of same material has length, 4L and diameter 2d, the resistance will be

Question # 19

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

Question # 20

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

Question # 21

If 2.2 kilowatt power is transmitted through a 10 ohm line at 22000 volt, the power loss in the form of heat will be

Question # 22

Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity will be

Question # 23

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 # 24

The electric flux from a closed surface

Question # 25

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 # 26

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

Question # 27

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 # 28

When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to

Question # 29

The force between two chares 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become

Question # 30

The nature of capacity of electrostatic capacitor depends on

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 A closed surface contains two equal and opposite charges. The net electric flux from the surface will be
A. Negative
B. Positive
C. Infinite
D. Zero
2 The energy stored in a charge capacitor
A. 1/2CV2
B. 1/2C2V
C. 1/2C/V2
D. None of these
3 The unit of resistivity is
A. ohm
B. ohm-m2
C. ohm-meter
D. ohm-m-1
4 Specific resistance of a wire depends upon
A. Length
B. Cross-section area
C. Mass
D. None
5 In a charged capacitor the energy is stored in
A. Both in positive and negative charges
B. Positive charges
C. The edges of the capacitor plates
D. The electric field between the plates
6 A charge Q is divided into two parts q and Q - q and separated by a distance R. The force of repulsion between them will be maximum when
A. q = Q/4
B. q = Q/2
C. q = !
D. None of these
7 The speed of randomly moving electrons depends upon
A. pressure
B. volume
C. temperature
D. mass
8 The relation V = IR represents
A. Ampere law
B. Faraday's law
C. Ohm's law
D. Len's law
9 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
A. 3.9
B. 4
C. 4.2
D. 6
10 Coulomb's force between two point charges depends upon
A. Magnitude of charges
B. Distance between them
C. Medium in which they are located
D. All of the above

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