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

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

Question # 2

The concept of field theory was put forward by

Question # 3

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

Question # 4

Consider a spherical shell of metal at he centre of which a positive point charge is kept

Question # 5

Resistor is a device which convert electric energy to

Question # 6

The resistivity of a substance depends upon the

Question # 7

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

Question # 8

The SI unit of permitivity is

Question # 9

A metal plate of thickness half the separation between the capacitor plates of capacitance C is inserted. The new capacitance is

Question # 10

The thermistors are usually made of

Question # 11

The graphical representation of ohm's law is

Question # 12

If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us

Question # 13

The unit of resistance is

Question # 14

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

Question # 15

Equal charges are given to two spheres of different radii. The potential will

Question # 16

The minimum charge on any object can not be less than

Question # 17

Heating effect caused by an electric circuit is written

Question # 18

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 # 19

The unit of intensity of electric field is

Question # 20

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 # 21

The SI unit of capacitance is

Question # 22

The resistance of an incandescent lamp is

Question # 23

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 # 24

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

Question # 25

The electric lines of force are

Question # 26

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 # 27

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

Question # 28

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 # 29

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

Question # 30

106electrons are moving through a wire per second, the current developed is

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The electric flux is linked with a surface will be maximum when
A. The surface is held parallel to the electric field
B. The surface is held perpendicular to the electric field
C. The surface makes an angle of 45° with the electric field
D. All of the above
2 The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as
A. voltmeters
B. resistance
C. electrode
D. current
3 The ohm's is defined as
A. 1 ampere / 1 volts
B. 1 coulomb / 1 volt
C. 1 volt / 1 ampere
D. 1 volt / 1 coulomb
4 The electric lines of force are
A. Imaginary
B. Physically existing everywhere
C. Physically existing near the charge
D. All of the above
5 The resistance of the given conductor can be increased by
A. Increasing the area
B. Changing resistivity
C. Decreasing the length
D. None of the above because change does not matter because in any case the volume remains the same
6 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
7 The earth's potential is taken as
A. Negative
B. Positive
C. Zero
D. Infinite
8 The electric intensity outside the two oppositely charged parallel metal plates is
A. Maximum
B. Minimum
C. Zero
D. Infinite
9 If the distance between the plates of a parallel plate condenser of capacity 10μF is doubled then new capacity will be
A. 5μF
B. 20μF
C. 10μF
D. 15μF
10 Free electrons are
A. tightly bound
B. fixed
C. loosely bound
D. tightly fixed

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