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

Electron volt is the unit of

Question # 2

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 # 3

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

Question # 4

Electron volt is the unit of.

Question # 5

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 # 6

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

Question # 7

A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy

Question # 8

Resistance of a conductor depends upon

Question # 9

The nature of capacity of electrostatic capacitor depends on

Question # 10

The speed of randomly moving electrons depends upon

Question # 11

The resistivity of a substance depends upon the

Question # 12

The ohm's is defined as

Question # 13

A 10 F capacitor is charged to a potential difference of 50 V and is connected to another uncharged capacitor in parallel. Now the common potential difference becomes 20 volt.The capacitance of second capacitor is

Question # 14

The unit of resistance is

Question # 15

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

Question # 16

Ohm's law states that

Question # 17

The SI unit of electric flux is

Question # 18

The SI unit of permitivity is

Question # 19

The electric intensity outside the two oppositely charged parallel metal plates is

Question # 20

One moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is

Question # 21

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

Question # 22

Calculate the amount of charge flowing in 2 minutes in a wire of resistance 10Ωwhen a potential difference of 20 V is applied between its ends

Question # 23

Physicist George Simon ohm was a

Question # 24

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

Question # 25

Coulomb force, when any material medium is placed between two charges

Question # 26

In a building, there are 15 bulbs of 40 watts, 5 bulbs of 100 watts, 5 fans of 80 watts and a heater of 1 kilowatt. The voltage of the electric main is 220 volts. The minimum efficiency of the main fuse of the building will be

Question # 27

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

Question # 28

The unit of conductance is

Question # 29

Solar cell converts sunlight directly into

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The capacity of a parallel plat capacitor depends on the
A. Type to metal used
B. Thickness of plates
C. Potential applied across the plates
D. Separation between the plates
2 Which of the following does not obey ohm's law?
A. Copper
B. Al
C. Diode
D. None
3 Which one of the following is the unit of electric field intensity
A. JC-1
B. Vm-1
C. Cm-1
D. CJ-1
4 Coulomb force, when any material medium is placed between two charges
A. Increases
B. Decreases
C. Remain unchanged
D. None of these
5 Battery is charged in motor cars, which is based on
A. Chemical effect
B. Magnetic effect
C. Electric effect
D. None
6 If the length of the conductor is double and its cross sectional area is halved, its conductance will
A. Increase four fold
B. Become one-fourth
C. Become one-half
D. Remains unchanged
7 A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is
A. Zero
B. 0.5Ω
C. 1.1Ω
D. 5.0Ω
8 Coulomb's force between two point charges depends upon
A. Magnitude of charges
B. Distance between them
C. Medium in which they are located
D. All of the above
9 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?
A. Zero
B. 5μC m-2
C. 20μC m-2
D. 8μC m-2
10 The minimum charge on any object can not be less than
A. 1.6 x 10-19C
B. 3.2 x 10-19C
C. 1.0 C
D. 4.8 x 10-19C

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