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

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

Question # 2

An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be

Question # 3

At any point on the right bisector of the line joining two equal and opposite charges

Question # 4

Coulomb's force between two point charges depends upon

Question # 5

A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?

Question # 6

Battery is charged in motor cars, which is based on

Question # 7

The electric intensity at infinite distance from the point charge will be

Question # 8

Thermocouple is an arrangement of two different metals

Question # 9

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

Question # 10

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

Question # 11

The energy stored in a charge capacitor

Question # 12

One coulomb of charge is created by

Question # 13

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

Question # 14

Some charge is being given to a conductor. Then its potential

Question # 15

Resistance of a conductor depends upon

Question # 16

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

Question # 17

The resistivity of a substance depends upon the

Question # 18

One joule is equal to

Question # 19

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

Question # 20

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

Question # 21

The electric field due to an infinite long thin wire at a distance R varies as

Question # 22

Electron volt is the unit of.

Question # 23

The unit of resistivity is

Question # 24

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

Question # 25

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 # 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 concept of field theory was put forward by

Question # 28

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

Question # 29

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

Question # 30

The fractional change in resistance per kelvin is known as

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
2 Ohm is the unit of
A. current
B. capacitance
C. energy
D. resistance
3 The SI unit of electric flux is
A. Weber
B. Nm2C-1
C. NmC-1
D. Nm-2C
4 Consider a spherical shell of metal at he centre of which a positive point charge is kept
A. The electric filed is zero outside the shell
B. The electric field is zero everywhere
C. The electric field is zero in the region inside the shell
D. The electric field is non-zero in both regions outside and inside the shell
5 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
6 The unit of resistance is
A. volt
B. ampere
C. ohm
D. coat
7 One coulomb per second is equal to
A. One volt
B. One ampere
C. One hom
D. One henry
8 A car battery has e.m.f 12 volt and internal resistance 5 x 10-2ohm. If it draws 60 ampere current, the terminal voltage of the battery will be
A. 5 volt
B. 3 volt
C. 15 volt
D. 9 volt
9 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
10 Coulomb force, when any material medium is placed between two charges
A. Increases
B. Decreases
C. Remain unchanged
D. None of these

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