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

Question # 2

Physicist George Simon ohm was a

Question # 3

Which of the following represents an electric current?

Question # 4

A point charge Q is placed at the mid-point of a line joining two charges. 4q and q. if the net force on charge q is zero. then Q must be equal to

Question # 5

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

Question # 6

Electric potential of earth is taken to be zero because the earth is good

Question # 7

The SI unit of current is

Question # 8

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

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

In a charged capacitor the energy is stored in

Question # 13

The dot product of electric field intensity E and vector area A is called

Question # 14

A (100 W , 200 W) bulb is connected to a 160 V power supply. The power consumption would be

Question # 15

Resistance of a conductor is increased, the currant will

Question # 16

The speed of randomly moving electrons depends upon

Question # 17

Electron volt is the unit of

Question # 18

The ohm's is defined as

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

A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, then

Question # 21

The resistance of the given conductor can be increased by

Question # 22

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

Question # 23

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

Question # 24

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

Question # 25

Electron volt is the unit of.

Question # 26

The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is

Question # 27

The SI unit of electric flux is

Question # 28

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

Question # 29

Resistance of a conductor depends upon

Question # 30

If an electron of charge 'e' is accelerated through a potential difference V., it will acquire energy

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is
A. 11.0 ohm
B. 1.0 ohm
C. 7.0 ohm
D. 3.0 ohm
2 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
3 A certain charge liberates 0.8 g of oxygen. The same charge will liberate. how many g of silver?
A. 108 g
B. 10.8 g
C. 0.8 g
D. 108/0.8 g
4 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
5 Potentiometer is more sensitive than voltmeter, because
A. Voltmeter has a very high resistance
B. Voltmeter has a very low resistance
C. Potentiometer does not draw any current from a source of unknown potential difference
D. Potentiometer is sensitive
6 Electric potential of earth is taken to be zero because the earth is good
A. Semiconductor
B. Conductor
C. Insulator
D. Dielectric
7 If electric and gravitational force on an electron in a uniform electric field will be
A. E=mg/q
B. E=q/mg
C. E=,g/q
D. E=qg/m
8 Electric generators which convert mechanical energy into
A. solar energy
B. thermal energy
C. kinetic energy
D. electrical energy
9 Ohm is the unit of
A. current
B. capacitance
C. energy
D. resistance
10 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

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