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

Potentiometer is more sensitive than voltmeter, because

Question # 2

Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be

Question # 3

If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is

Question # 4

In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes

Question # 5

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

Question # 6

If electric and gravitational force on an electron in a uniform electric field will be

Question # 7

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 # 8

If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be

Question # 9

A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is

Question # 10

The concept of field theory was put forward by

Question # 11

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

Question # 12

The relation V = IR represents

Question # 13

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

Question # 14

The liquid which conduct current is known as

Question # 15

The ohm's is defined as

Question # 16

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

Question # 17

The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is

Question # 18

A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance

Question # 19

Electron volt is the unit of.

Question # 20

Three resistors of resistance R each are combined in various ways. Which of the following cannot be obtained?

Question # 21

The unit of resistivity is

Question # 22

One coulomb of charge is created by

Question # 23

The electric intensity outside the two oppositely charged parallel metal plates is

Question # 24

Battery is charged in motor cars, which is based on

Question # 25

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 # 26

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

Question # 27

In a voltmeter the conduction takes place due to

Question # 28

The SI unit of permitivity is

Question # 29

Specific resistance of a wire depends upon

Question # 30

The resistance of a conductor does not depend on its

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The concept of field theory was put forward by
A. Franklin
B. Kepler
C. Oersted
D. Michael Faraday
2 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
3 The SI unit of electric flux is
A. Weber
B. Nm2C-1
C. NmC-1
D. Nm-2C
4 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
A. 10μF
B. 20μF
C. 30μF
D. 15μF
5 Battery is charged in motor cars, which is based on
A. Chemical effect
B. Magnetic effect
C. Electric effect
D. None
6 A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy
A. 200 J
B. 100 J
C. 1000 J
D. 400 J
7 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
8 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
9 If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be
A. 6 ohm
B. 4 ohm
C. zero ohm
D. 1.33 ohm
10 The current through a metallic conductor is due to the motion of
A. protons
B. neutrons
C. electrons
D. free electrons

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