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 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 # 2

If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be

Question # 3

Thermocouple is an arrangement of two different metals

Question # 4

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

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

The minimum charge on any object can not be less than

Question # 7

A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is

Question # 8

The nature of capacity of electrostatic capacitor depends on

Question # 9

The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is

Question # 10

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

Question # 11

The liquid which conduct current is known as

Question # 12

A conducting wire is drawn to double its length. Final resistivity of the material will be

Question # 13

A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance

Question # 14

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 # 15

Resistor is a device which convert electric energy to

Question # 16

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

Question # 17

In a voltmeter the conduction takes place due to

Question # 18

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

Question # 19

In a charged capacitor the energy is stored in

Question # 20

Current provided by a battery is maximum when

Question # 21

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

Question # 22

Electric flux is defined by the relation

Question # 23

The energy stored in a charge capacitor

Question # 24

The capacitance of a parallel plate capacitor depends upon

Question # 25

Two conductors having the same type of charges are connected by a conducting wire. There would not be any amount of charges on them if

Question # 26

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

Question # 27

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

Question # 28

For two resistance wires joined in parallel, the resultant resistance is 6/5 ohm. When one of the resistance wire breaks, the effective resistance becomes 2 ohm. The resistance of the broken wire is

Question # 29

The electric field intensity at a point due to a point charge

Question # 30

Electric generators which convert mechanical energy into

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 If an electron of charge 'e' is accelerated through a potential difference V., it will acquire energy
A. Ve
B. V/e
C. e/V
D. 2Ve
2 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
3 The dot product of electric field intensity E and vector area A is called
A. Electric potential
B. Electric flux
C. Electric field
D. Magnetic field
4 In bringing an electron towards another electron, electrostatic potential energy of system
A. Decreases
B. Increases
C. Remains uncharged
D. Becomes zero
5 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
6 A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance
A. Increase k time
B. Decreases k times
C. Decreases 1/K times
D. Remains unchanged
7 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
8 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
9 Which one of the following causes production of heat when current is set up in a wire?
A. Fall of electrons from higher orbits to lower orbits
B. Inter-atomic collisions
C. Inter-electron collisions
D. Collisions of conduction electron with atoms
10 Some charge is being given to a conductor. Then its potential
A. Is maximum at surface
B. Is maximum at centre
C. Is remain same throughout the conductor
D. Is maximum somewhere between surface and centre

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