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

If 2.2 kilowatt power is transmitted through 1 10 ohm line at 22000 volt, the power loss in the form of heat will be

Question # 3

The resistance of the given conductor can be increased by

Question # 4

Battery is charged in motor cars, which is based on

Question # 5

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

Question # 6

The electric field due to an infinite long thin wire at a distance R varies as

Question # 7

Some charge is being given to a conductor. Then its potential

Question # 8

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

Question # 9

Resistance of a conductor is increased, the currant will

Question # 10

Which of the following represents an electric current?

Question # 11

The unit of intensity of electric field is

Question # 12

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 # 13

The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is

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

The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as

Question # 16

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 # 17

In bringing an electron towards another electron, electrostatic potential energy of system

Question # 18

The value of electrical constant of proportionality k is

Question # 19

The potential difference across each resistance in series combination is

Question # 20

The colour sequence in a carbon resistor in red, brown, orange and silver. The resistance of the resistor is

Question # 21

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

Question # 22

The graphical representation of ohm's law is

Question # 23

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 # 24

The capacity of a parallel plat capacitor depends on the

Question # 25

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

Question # 26

The electric flux from a closed surface

Question # 27

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

Question # 28

Potentiometer is more sensitive than voltmeter, because

Question # 29

Specific resistance of a wire depends upon

Question # 30

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10-15 is

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Which of the following represents an electric current?
A. C-1
B. CS-1
C. J.S-1
D. dynes-1
2 A condenser of capacity 50μF is charged to 10 V.The energy stored is
A. 1.25 x 10-3J
B. 3.75 x 10-3J
C. 2.5 x 10-3J
D. 5 x 10-3J
3 106electrons are moving through a wire per second, the current developed is
A. 1.6 x 10-19
B. 1 A
C. 1.6 x 10-15 A
D. 106A
4 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
A. q = Q/4
B. q = Q/2
C. q = !
D. None of these
5 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
6 Electric potential of earth is taken to be zero because the earth is good
A. Semiconductor
B. Conductor
C. Insulator
D. Dielectric
7 The electric field will be uniform
A. Near a positive point charge
B. Near a negative point charge
C. Between two oppositely charged parallel metal plates
D. None of above
8 The resistance of an incandescent lamp is
A. Smaller when switched on
B. Greater when switched off
C. The same whether it is switch off or switch on
D. Greater when switched on
9 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
A. 1.92 N
B. 19.2 N
C. 12 N
D. 0.192 N
10 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
A. They have the same potential
B. They have the same amount of charge
C. They have the same capacity
D. They have the same shape

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