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

A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is

Question # 2

One coulomb of charge is created by

Question # 3

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

Question # 4

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

Question # 5

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 # 6

Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity will be

Question # 7

Electron volt is the unit of

Question # 8

Free electrons are

Question # 9

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

Question # 10

The unit of resistivity is

Question # 11

One joule is equal to

Question # 12

Two point charge +3μC and +8μC repel each other with a force of 40 N. If a charge of -5μC is added to each of them, then the force between then will become

Question # 13

Which one of the following is the unit of electric field intensity

Question # 14

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

Question # 15

The charge carriers in electrolyte are positive and negative

Question # 16

Magnetic effect at a point caused due to flow a current depend upon the

Question # 17

The graphical representation of ohm's law is

Question # 18

The thermistors are usually made of

Question # 19

The relation between charge 'Q' and current 'I' is given by

Question # 20

The capacity of a parallel plat capacitor depends on the

Question # 21

The electrode connected with the positive terminal of the current source is called

Question # 22

The resistivity of a substance depends upon the

Question # 23

Battery is charged in motor cars, which is based on

Question # 24

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 # 25

A current of 1.6 A is passed through a solution of CuSO4. How many Cu2+ions are liberated in one minute?

Question # 26

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

Question # 27

The potential difference across the conductors should be maintained constant by connecting the ends of wire to the terminal of a device called a source of

Question # 28

Which of the following represents an electric current?

Question # 29

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

Question # 30

Surface density of charge is defined as

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ECAT 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 A wire is bent into a ring of radius R is given a charge q. The magnitude of the electrical field at the centre of the ring is
A. Two
B. 1/2
C. Zero
D. 3/2
3
Question Image
A. 5μF
B. 10μF
C. 3μF
D. 6μF
4 In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes
A. Four-fold
B. One-half
C. One-fourth
D. Zero
5 Which one of the following is the unit of electric field intensity
A. JC-1
B. Vm-1
C. Cm-1
D. CJ-1
6 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
7 A current of 1.6 A is passed through a solution of CuSO4. How many Cu2+ions are liberated in one minute?
A. 3 x 1020
B. 3 x 1010
C. 6 x 1020
D. 6 x 1010
8 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
9 A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor
A. Increases
B. Decreases
C. Remain unchanged
D. Becomes infinite
10 Ohm is the unit of
A. current
B. capacitance
C. energy
D. resistance

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