ECAT Pre General Science Physics Chapter 12 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 12 Electrostatics

Try The MCQ's Test For ECAT Pre General Science Physics Chapter 12 Electrostatics

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ECAT Pre General Science Physics Chapter 12 Electrostatics

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Question # 1

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 # 2

Cause of heat production in a current carrying conductor is

Question # 3

The thermistors are usually made of

Question # 4

The electric flux from a closed surface

Question # 5

If the length of the conductor is double and its cross sectional area is halved, its conductance will

Question # 6

Which of the following represents an electric current?

Question # 7

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

Question # 8

The SI unit of permitivity is

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 energy stored in a charge capacitor

Question # 11

Resistance of a conductor depends upon

Question # 12

Electric flux is defined by the relation

Question # 13

A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J

Question # 14

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

Question # 15

The SI unit of electric field intensity is

Question # 16

Two electric bulbs of 200 W and 100 W have same voltage. If R1and R2be their resistance respectively then

Question # 17

Electron volt is the unit of

Question # 18

An electric charge at rest is

Question # 19

If we increase the distance between two plates of the capacitor, the capacitance will

Question # 20

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 # 21

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

Question # 22

Physicist George Simon ohm was a

Question # 23

A (100 W , 200 W) bulb is connected to a 160 V power supply. The power consumption would be

Question # 24

In a charged capacitor the energy is stored in

Question # 25

Resistor is a device which convert electric energy to

Question # 26

If a 40 watt light bulb burns for 2 hours. how much heat is generated

Question # 27

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

Question # 28

Ohm's law states that

Question # 29

At ordinary temperature, an increase in temperature increases the conductivity of

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Capacitance of two or more capacitors
A. Increases in series combination
B. Increases in parallel combination
C. Remains unchanged
D. None of the above
2 If a 40 watt light bulb burns for 2 hours. how much heat is generated
A. 288 x 103J
B. 288 x 108J
C. 288 x 105J
D. 288 x 106J
3 The capacitance of a parallel plate capacitor depends upon
A. Area of the plates
B. Separation between the plates
C. Medium between the plates
D. All of the above
4 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
A. 1/3 V
B. 2/3 V
C. 3/2 V
D. 3V
5 A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is
A. 8 J
B. 16 J
C. 4 x 10-3J
D. 2 x 10-3J
6 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
7 A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of 1 KV, its kinetic energy will be
A. 1840 KeV
B. 1/1840 KeV
C. 1 KeV
D. 920 KeV
8 Electron volt is the unit of.
A. Potential difference
B. Energy
C. Resistance
D. Capacitance
9 Solar cell converts sunlight directly into
A. potential energy
B. thermal energy
C. mechanical energy
D. electrical energy
10 The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is
A. Q=V/C
B. Q=C/V
C. Q=1/2CV
D. Q=CV

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