ECAT Pre General Science Physics Chapter 12 MCQ Test With Answer

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

The capacity of a parallel plat capacitor depends on the

Question # 2

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

Question # 3

In a charged capacitor the energy is stored in

Question # 4

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

Question # 5

Force acting upon a charged particle kept between the plates of a charged condenser if F. IF one of the plates of the condenser is removed, force acting on the same will become

Question # 6

The conventional current in a circuit is defined as " current which passes from a point at higher potential to a point at lower potential as if it represent a movement of

Question # 7

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

Question # 8

Resistor is a device which convert electric energy to

Question # 9

Resistance of a conductor is increased, the currant will

Question # 10

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

Question # 11

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

Question # 12

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 # 13

The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is

Question # 14

One coulomb of charge is created by

Question # 15

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 # 16

When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates

Question # 17

Two point charges A and B separated by a distance R attract each other with a force of 12 x 10-3N. The force between A and B when the charges on them are doubled and distance is halved

Question # 18

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 # 19

Resistance of a conductor depends upon

Question # 20

A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?

Question # 21

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

Question # 22

The unit of intensity of electric field is

Question # 23

At any point on the right bisector of the line joining two equal and opposite charges

Question # 24

One electron volt is equal to

Question # 25

If the two charges in Coulomb's law have double distance between them, then electric force

Question # 26

A 60 W bulb operates on 220 V supply. The current flowing through the bulb is

Question # 27

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

Question # 28

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 # 29

Electric flux is defined by the relation

Question # 30

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

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ECAT Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
2 Electric flux is defined by the relation
A. E.A.
B. E x A
C. E/A
D. none of these
3 Free electrons are
A. tightly bound
B. fixed
C. loosely bound
D. tightly fixed
4 The ratio of the gravitational force Fgto the electrostatic force Febetween two electrons at the same distance apart is approximately
A. 9.8
B. 24 x 1019
C. 24 x 1042
D. 24 x 10-44
5
Question Image
A. 5μF
B. 10μF
C. 3μF
D. 6μF
6 Capacitance of two or more capacitors
A. Increases in series combination
B. Increases in parallel combination
C. Remains unchanged
D. None of the above
7 One coulomb per second is equal to
A. One volt
B. One ampere
C. One hom
D. One henry
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 Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is
A. 11.0 ohm
B. 1.0 ohm
C. 7.0 ohm
D. 3.0 ohm
10 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
A. 0.4 A
B. 11.4 A
C. 9.8 A
D. 10.6 A

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