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

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 # 2

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

Question # 3

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 # 4

Electron volt is the unit of.

Question # 5

One coulomb of charge is created by

Question # 6

Ohm's law states that

Question # 7

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

Question # 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

Question # 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?

Question # 10

Cause of heat production in a current carrying conductor is

Question # 11

A point charge Q is placed at the mid-point of a line joining two charges. 4q and q. if the net force on charge q is zero. then Q must be equal to

Question # 12

The energy stored in a charge capacitor

Question # 13

Which of the following represents an electric current?

Question # 14

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

Question # 15

An electric charge at rest is

Question # 16

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

Question # 17

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

Question # 18

Resistor is a device which convert electric energy to

Question # 19

The powers of tow electric bulbs are 100 W and 200 W. Both of them are joined with 220 V mains. The ratio of resistances of their filaments will be

Question # 20

The unit of intensity of electric field is

Question # 21

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

Question # 22

The capacitance of a parallel plate capacitor depends upon

Question # 23

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

Question # 24

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

Question # 25

The SI unit of electric field intensity is

Question # 26

The electric flux from a closed surface

Question # 27

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 # 28

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

Question # 29

The value of electrical constant of proportionality k is

Question # 30

In a charged capacitor the energy is stored in

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The SI unit of permitivity is
A. Nm2C2
B. N-1m-2C2
C. NmC2
D. Nm2C-1
2 Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity will be
A. 711μF
B. 611μF
C. 811μF
D. 511μF
3 The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is
A. 10 KJ
B. 5 KJ
C. 2 KJ
D. 1 KJ
4 The electric flux from a closed surface
A. Is independent of the shape of the surface
B. Depends on the charge enclosed by the surface
C. Both a and b
D. None of the above
5 Ohm is the unit of
A. current
B. capacitance
C. energy
D. resistance
6 If the distance of separation between two chares is increased, the electrical potential energy of the system will
A. Increase
B. Decrease
C. May increase or decrease
D. Remain the same
7 A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J
A. 5
B. 0.5
C. 0.005
D. 50
8 The electric intensity outside the two oppositely charged parallel metal plates is
A. Maximum
B. Minimum
C. Zero
D. Infinite
9 Which one of the following has larger value of relative permitivity Erat room temperature?
A. Vaccum
B. Air
C. Glass
D. Water
10 Current provided by a battery is maximum when
A. Internal resistance equal to external resistance
B. Internal resistance is greater than external resistance
C. Internal resistance is less then external resistance
D. None of these

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