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 SI unit of current is

Question # 2

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

Question # 3

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 # 4

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

Question # 5

Resistance of a conductor depends upon

Question # 6

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

Question # 7

Which one of the following has larger value of relative permitivity Erat room temperature?

Question # 8

The electric flux from a closed surface

Question # 9

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

Question # 10

The nature of capacity of electrostatic capacitor depends on

Question # 11

The SI unit of electric field intensity is

Question # 12

An electric charge at rest is

Question # 13

Which one of the following causes production of heat when current is set up in a wire?

Question # 14

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

Question # 15

Resistor is a device which convert electric energy to

Question # 16

The resistivity of a substance depends upon the

Question # 17

In a charged capacitor the energy is stored in

Question # 18

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

Question # 19

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 # 20

The unit of conductance is

Question # 21

Coulomb's force between two point charges depends upon

Question # 22

A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is

Question # 23

The resistance of the given conductor can be increased by

Question # 24

A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. The quantity that remains unchanged is

Question # 25

A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?

Question # 26

The speed of randomly moving electrons depends upon

Question # 27

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 # 28

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

Question # 29

Specific resistance of a wire depends upon

Question # 30

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

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ECAT Class Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Electron volt is the unit of
A. Potential difference
B. Energy
C. Resistance
D. Capacitance
2 Two electric bulbs of 200 W and 100 W have same voltage. If R1and R2be their resistance respectively then
A. R1= 2R2
B. R2= 2R1
C. R2 = 4R1
D. R1= 4R2
3 The electric field due to an infinite long thin wire at a distance R varies as
A. 1/R
B. 1/R2
C. R
D. R2
4 Resistance of a conductor is increased, the currant will
A. Decrease
B. Increase
C. Remain the same
D. None of these
5 Three resistors of resistance R each are combined in various ways. Which of the following cannot be obtained?
A. 3RΩ
B. 2R/4Ω
C. R/3Ω
D. 2R/3Ω
6 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
7 Ohm established a relation between
A. voltage and resistance
B. voltage and charge
C. voltage and current
D. voltage resistance and charge
8 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
A. 7.20 N
B. 11.25 N
C. 22.50 N
D. 45.00
9 The fractional change in resistance per kelvin is known as
A. temperature coefficient
B. resistance coefficient
C. super temperature
D. critical temperature
10 The SI unit of electric flux is
A. Weber
B. Nm2C-1
C. NmC-1
D. Nm-2C

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