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

In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called

Question # 2

The potential difference across each resistance in series combination is

Question # 3

A 60 W bulb operates on 220 V supply. The current flowing through the bulb is

Question # 4

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 # 5

Resistance of a conductor is increased, the currant will

Question # 6

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

Question # 7

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 # 8

Which of the following does not obey ohm's law?

Question # 9

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

Question # 10

Cause of heat production in a current carrying conductor is

Question # 11

The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is

Question # 12

The ohm's is defined as

Question # 13

Battery is charged in motor cars, which is based on

Question # 14

A hollow insulated conduction sphere is given a positive charge of 10μC. What will be the electric field at the centre of the sphere if its radius is 2 meters?

Question # 15

One joule is equal to

Question # 16

The minimum charge on any object can not be less than

Question # 17

Coulomb force, when any material medium is placed between two charges

Question # 18

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

Question # 19

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

Question # 20

The unit of intensity of electric field is

Question # 21

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

Question # 22

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

Question # 23

A condenser of capacity 50μF is charged to 10 V.The energy stored is

Question # 24

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

Question # 25

The resistance of the given conductor can be increased by

Question # 26

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 # 27

A closed surface contains two equal and opposite charges. The net electric flux from the surface will be

Question # 28

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 # 29

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

Question # 30

Two point charges A and B separated by a distance R attract each other with a force of 12 x 10-3N. The force between A and B when the charges on them are doubled and distance is halved

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The SI unit of conductivity is
A. ohm-m
B. ohm-1m-1
C. ohm-m-1
D. ohm-1m
2 One electron volt is equal to
A. 1.6 x 1019eV
B. 6.25 x 1018 eV
C. 1.6 x 1018 eV
D. 6.25 x 1019eV
3 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
4 The SI unit of electric flux is
A. Weber
B. Nm2C-1
C. NmC-1
D. Nm-2C
5 Current provided by a battery is maximum when
A. Internal resistance equal to external resistance
B. Internal resistance is greater than external resistance
C. Internal resistance is less then external resistance
D. None of these
6 The energy stored in a charge capacitor
A. 1/2CV2
B. 1/2C2V
C. 1/2C/V2
D. None of these
7 The liquid which conduct current is known as
A. heating effect
B. chemical energy
C. electrolyte
D. ohm's law
8 The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is
A. Q=V/C
B. Q=C/V
C. Q=1/2CV
D. Q=CV
9 In a voltmeter the conduction takes place due to
A. Electrons only
B. Holes only
C. Electrons and holes
D. Electrons and ions
10 If we increase the distance between two plates of the capacitor, the capacitance will
A. Increase
B. Decrease
C. Remain same
D. First increase then decrease

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