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

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

Question # 2

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

Question # 3

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 # 4

Ohm's law states that

Question # 5

Potentiometer is more sensitive than voltmeter, because

Question # 6

The resistivity of a substance depends upon the

Question # 7

The concept of field theory was put forward by

Question # 8

The charge carriers in gases are

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

If a charged spherical conductor of radius 10 cm has potential V at a point distance 5 cm from its centre, then the potential at a point distance 15 cm from the centre will be

Question # 16

The unit of intensity of electric field is

Question # 17

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

Question # 18

Two electric bulbs of 200 W and 100 W have same voltage. If R1and R2be their resistance respectively then

Question # 19

The capacitance of a parallel plate capacitor depends upon

Question # 20

The minimum charge on any object can not be less than

Question # 21

A wire is bent into a ring of radius R is given a charge q. The magnitude of the electrical field at the centre of the ring is

Question # 22

Surface density of charge is defined as

Question # 23

Free electrons are

Question # 24

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

Question # 25

At ordinary temperature, an increase in temperature increases the conductivity of

Question # 26

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 # 27

The unit of resistance is

Question # 28

The electric field will be uniform

Question # 29

If the length of the conductor is double and its cross sectional area is halved, its conductance will

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
A. -q
B. +q
C. -2q
D. +4q
2 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
3 Specific resistance of a wire depends upon
A. Length
B. Cross-section area
C. Mass
D. None
4 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
5 At ordinary temperature, an increase in temperature increases the conductivity of
A. Conductor
B. Semiconductor
C. Insulator
D. Alloy
6 The capacitance of a parallel plate capacitor depends upon
A. Area of the plates
B. Separation between the plates
C. Medium between the plates
D. All of the above
7 An alpha particle is accelerated through a potential difference of 106volt. Its kinetic energy will be
A. 1 MeV
B. 2 MeV
C. 4 MeV
D. 8 MeV
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 2.2 kilowatt power is transmitted through 1 10 ohm line at 22000 volt, the power loss in the form of heat will be
A. 0.1 watt
B. 1 watt
C. 10 watt
D. 100 watt
10 The minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is
A. 4/5Ω
B. 5/4Ω
C. 20Ω
D. 0.05 Ω

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