ECAT Pre General Science Physics Chapter 12 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 12 Electrostatics

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

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ECAT Pre General Science Physics Chapter 12 Electrostatics

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Question # 1

Which one of the following causes production of heat when current is set up in a wire?

Question # 2

Ohm's law states that

Question # 3

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

Question # 4

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

Question # 5

Specific resistance of a wire depends upon

Question # 6

Which one of the following is the unit of electric field intensity

Question # 7

The capacity of a parallel plat capacitor depends on the

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

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

Question # 10

Solar cell converts sunlight directly into

Question # 11

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 # 12

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

Question # 13

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

Question # 14

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

Question # 15

The resistivity of a substance depends upon the

Question # 16

In a voltmeter the conduction takes place due to

Question # 17

The fractional change in resistance per kelvin is known as

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

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

Question # 20

The powers of tow electric bulbs are 100 W and 200 W. Both of them are joined with 220 V mains. The ratio of resistances of their filaments will be

Question # 21

Current provided by a battery is maximum when

Question # 22

A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is

Question # 23

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

Question # 24

The graphical representation of ohm's law is

Question # 25

The capacitance of a parallel plate capacitor depends upon

Question # 26

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

Question # 27

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 # 28

The charge carriers in electrolyte are positive and negative

Question # 29

In a charged capacitor the energy is stored in

Question # 30

One joule is equal to

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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 The electric intensity at infinite distance from the point charge will be
A. Infinite
B. Positive
C. Zero
D. Negative
3 The liquid which conduct current is known as
A. heating effect
B. chemical energy
C. electrolyte
D. ohm's law
4 The relation between charge 'Q' and current 'I' is given by
A. Q = I/t
B. Q = It
C. Q = I2t
D. Q = I2/t
5 The energy stored in a charge capacitor
A. 1/2CV2
B. 1/2C2V
C. 1/2C/V2
D. None of these
6 If the length of the conductor is double and its cross sectional area is halved, its conductance will
A. Increase four fold
B. Become one-fourth
C. Become one-half
D. Remains unchanged
7 In a building, there are 15 bulbs of 40 watts, 5 bulbs of 100 watts, 5 fans of 80 watts and a heater of 1 kilowatt. The voltage of the electric main is 220 volts. The minimum efficiency of the main fuse of the building will be
A. 0.4 A
B. 11.4 A
C. 9.8 A
D. 10.6 A
8 In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called
A. Time constant
B. Decay constant
C. None of these
D. All of above
9 The relation V = IR represents
A. Ampere law
B. Faraday's law
C. Ohm's law
D. Len's law
10 The ratio of the gravitational force Fgto the electrostatic force Febetween two electrons at the same distance apart is approximately
A. 9.8
B. 24 x 1019
C. 24 x 1042
D. 24 x 10-44

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