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 wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes

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

The energy stored in a charge capacitor

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

The liquid which conduct current is known as

Question # 8

In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes

Question # 9

The capacity of a parallel plat capacitor depends on the

Question # 10

The capacitance of a parallel plate capacitor depends upon

Question # 11

An electric charge at rest is

Question # 12

Resistance of a conductor is increased, the currant will

Question # 13

The SI unit of permitivity is

Question # 14

The graphical representation of ohm's law is

Question # 15

The electric field will be uniform

Question # 16

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

Question # 17

Electron volt is the unit of

Question # 18

A certain charge liberates 0.8 g of oxygen. The same charge will liberate. how many g of silver?

Question # 19

The unit of intensity of electric field is

Question # 20

An electric dipole is at the centre of a hollow sphere of radius r. The total normal electric flux through the sphere is (here Q is the charge and d is the distance between the two charges of the dipole)

Question # 21

Resistance of a conductor depends upon

Question # 22

The resistance of the given conductor can be increased by

Question # 23

Electric flux is defined by the relation

Question # 24

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

Question # 25

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

Question # 26

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

Question # 27

Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is

Question # 28

A charge Q is divided into two parts q and Q - q and separated by a distance R. The force of repulsion between them will be maximum when

Question # 29

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

Question # 30

If electric and gravitational force on an electron in a uniform electric field will be

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Free electrons are
A. tightly bound
B. fixed
C. loosely bound
D. tightly fixed
2 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
3 A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?
A. 200 W
B. 302.5
C. 250 W
D. 350 W
4 Solar cell converts sunlight directly into
A. potential energy
B. thermal energy
C. mechanical energy
D. electrical energy
5 The electric flux is linked with a surface will be maximum when
A. The surface is held parallel to the electric field
B. The surface is held perpendicular to the electric field
C. The surface makes an angle of 45° with the electric field
D. All of the above
6 The SI unit of conductivity is
A. ohm-m
B. ohm-1m-1
C. ohm-m-1
D. ohm-1m
7 The relation between charge 'Q' and current 'I' is given by
A. Q = I/t
B. Q = It
C. Q = I2t
D. Q = I2/t
8 Surface density of charge is defined as
A. Charge per unit volume
B. Charge per unit length
C. Charge per unit area
D. Charge per unit mass
9 The minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is
A. 4/5Ω
B. 5/4Ω
C. 20Ω
D. 0.05 Ω
10 Electron volt is the unit of
A. Potential difference
B. Energy
C. Resistance
D. Capacitance

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