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

The minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is

Question # 2

A condenser of capacity 50μF is charged to 10 V.The energy stored is

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

The resistance of the given conductor can be increased by

Question # 7

Electric flux is defined by the relation

Question # 8

Which of the following represents an electric current?

Question # 9

Calculate the amount of charge flowing in 2 minutes in a wire of resistance 10Ωwhen a potential difference of 20 V is applied between its ends

Question # 10

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

Question # 11

The ohm's is defined as

Question # 12

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

Question # 13

A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts

Question # 14

Resistor is a device which convert electric energy to

Question # 15

If the distance of separation between two chares is increased, the electrical potential energy of the system will

Question # 16

The electric flux is linked with a surface will be maximum when

Question # 17

The earth's potential is taken as

Question # 18

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 # 19

The relation V = IR represents

Question # 20

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

Question # 21

A metal plate of thickness half the separation between the capacitor plates of capacitance C is inserted. The new capacitance is

Question # 22

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

Question # 23

If the distance between the plates of a parallel plate condenser of capacity 10μF is doubled then new capacity will be

Question # 24

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 # 25

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 # 26

The powers of tow electric bulbs are 100 W and 200 W. Both of them are joined with 220 V mains. The ratio of resistances of their filaments will be

Question # 27

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

Question # 28

The charge carriers in gases are

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Calculate the amount of charge flowing in 2 minutes in a wire of resistance 10Ωwhen a potential difference of 20 V is applied between its ends
A. 120 C
B. 240 C
C. 20 C
D. 4 C
2 Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity will be
A. 711μF
B. 611μF
C. 811μF
D. 511μF
3 The conductivity of a superconductor is
A. Infinite
B. Very large
C. Very small
D. Zero
4 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
5 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
6 The SI unit of electric flux is
A. Weber
B. Nm2C-1
C. NmC-1
D. Nm-2C
7 The unit of intensity of electric field is
A. newton/coluomb
B. jule/coluomb
C. volt x metre
D. newton/metre
8 The charge carriers in electrolyte are positive and negative
A. protons
B. electrons
C. ions
D. none of these
9 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
10 The electric flux from a closed surface
A. Is independent of the shape of the surface
B. Depends on the charge enclosed by the surface
C. Both a and b
D. None of the above

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