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

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 # 2

The charge carriers in electrolyte are positive and negative

Question # 3

Battery is charged in motor cars, which is based on

Question # 4

The minimum charge on any object can not be less than

Question # 5

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

Question # 6

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

Question # 7

The unit of conductance is

Question # 8

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

Question # 9

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

Question # 10

If 2.2 kilowatt power is transmitted through 1 10 ohm line at 22000 volt, the power loss in the form of heat will be

Question # 11

The unit of intensity of electric field is

Question # 12

The relation V = IR represents

Question # 13

The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as

Question # 14

The liquid which conduct current is known as

Question # 15

Resistance of a conductor depends upon

Question # 16

A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of 1 KV, its kinetic energy will be

Question # 17

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 # 18

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

Question # 19

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 # 20

Force acting upon a charged particle kept between the plates of a charged condenser if F. IF one of the plates of the condenser is removed, force acting on the same will become

Question # 21

Electric generators which convert mechanical energy into

Question # 22

Solar cell converts sunlight directly into

Question # 23

The relation between charge 'Q' and current 'I' is given by

Question # 24

A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes

Question # 25

The earth's potential is taken as

Question # 26

The substances whose resistance decreases with the increase in temperature these substances have coefficient of

Question # 27

Free electrons are

Question # 28

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

Question # 29

One coulomb of charge is created by

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Which of the following does not obey ohm's law?
A. Copper
B. Al
C. Diode
D. None
2 Two point charge +3μC and +8μC repel each other with a force of 40 N. If a charge of -5μC is added to each of them, then the force between then will become
A. -10 N
B. +10 N
C. +20 N
D. -20 N
3 The electric field intensity at a point due to a point charge
A. Falls off inversely as the distance
B. Falls off inversely as the square of distance
C. Remains unchanged with distance
D. Increase directly as square of distance
4 The SI unit of current is
A. watt
B. coulomb
C. volt
D. ampere
5 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
6 Ohm is the unit of
A. current
B. capacitance
C. energy
D. resistance
7 A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts
A. 1310 W
B. 670 W
C. 810 W
D. 1210 W
8 A 100 W, 200 V bulb is connected to a 160 volts supply. The actual power consumption would be
A. 64 W
B. 80 W
C. 100 W
D. 125 W
9 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
10 If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is
A. one ohm
B. one joule
C. one volt
D. one ampere

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