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

Electric flux is defined by the relation

Question # 2

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 # 3

Which one of the following is the unit of electric field intensity

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

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

Question # 6

Coulomb's force between two point charges depends upon

Question # 7

Current provided by a battery is maximum when

Question # 8

The resistance of an incandescent lamp is

Question # 9

If a 40 watt light bulb burns for 2 hours. how much heat is generated

Question # 10

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

Question # 11

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 # 12

Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity will be

Question # 13

The thermistors are usually made of

Question # 14

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

Question # 15

The charge per unit time through any cross-section of a conductor is called

Question # 16

Electric potential of earth is taken to be zero because the earth is good

Question # 17

The earth's potential is taken as

Question # 18

The minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is

Question # 19

The relation V = IR represents

Question # 20

If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is

Question # 21

The unit of intensity of electric field is

Question # 22

The ohm's is defined as

Question # 23

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

Question # 24

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 # 25

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

Question # 26

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

Question # 27

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 # 28

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 # 29

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 # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10-15 is
A. 9 x 105V
B. 9 V
C. 8 x 106V
D. 80 V
2 One moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is
A. 0.1 V
B. 8 V
C. 2 V
D. 0.5 V
3 One coulomb of charge is created by
A. 10 electrons
B. 1.6 x 10-19electrons
C. 6.25 x 1018electrons
D. 6.25 x 1021electrons
4 The energy stored in a charge capacitor
A. 1/2CV2
B. 1/2C2V
C. 1/2C/V2
D. None of these
5 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
6 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
A. 1840 KeV
B. 1/1840 KeV
C. 1 KeV
D. 920 KeV
7 The fractional change in resistance per kelvin is known as
A. temperature coefficient
B. resistance coefficient
C. super temperature
D. critical temperature
8 When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates
A. Decreases
B. Increases
C. No change
D. May increase or decresase
9 The SI unit of current is
A. watt
B. coulomb
C. volt
D. ampere
10 The charge per unit time through any cross-section of a conductor is called
A. capacitance
B. electric power
C. current
D. potential difference

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