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

If an electron of charge 'e' is accelerated through a potential difference V., it will acquire energy

Question # 2

Three resistors of resistance R each are combined in various ways. Which of the following cannot be obtained?

Question # 3

The electric intensity at infinite distance from the point charge will be

Question # 4

The graphical representation of ohm's law is

Question # 5

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

Question # 6

A piece of fuse wire melts when a current of 15 ampere flows through it. With this current. If it dissipates 22.5 W, the resistance of fuse wire will be

Question # 7

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

Question # 8

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

Question # 9

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 # 10

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

Question # 11

The speed of randomly moving electrons depends upon

Question # 12

The conductivity of a superconductor is

Question # 13

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

Question # 14

106electrons are moving through a wire per second, the current developed is

Question # 15

The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10-19N, is

Question # 16

In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called

Question # 17

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

Question # 18

Surface density of charge is defined as

Question # 19

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 # 20

Electron volt is the unit of.

Question # 21

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

Question # 22

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 # 23

What is the current is a 2 x 106ohm resistor having a potential difference of 2 x 103volts?

Question # 24

Ohm is the unit of

Question # 25

Resistor is a device which convert electric energy to

Question # 26

The nature of capacity of electrostatic capacitor depends on

Question # 27

The SI unit of electric field intensity is

Question # 28

Coulomb force, when any material medium is placed between two charges

Question # 29

A uniform resistance wire of Length L and diameter d has a resistance R. Another wire of same material has length, 4L and diameter 2d, the resistance will be

Question # 30

The minimum charge on any object can not be less than

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Ohm established a relation between
A. voltage and resistance
B. voltage and charge
C. voltage and current
D. voltage resistance and charge
2 Free electrons are
A. tightly bound
B. fixed
C. loosely bound
D. tightly fixed
3 A 100 W, 200 V bulb is connected to a 160 volts supply. The actual power consumption would be
A. 64 W
B. 80 W
C. 100 W
D. 125 W
4 Resistance of a conductor is increased, the currant will
A. Decrease
B. Increase
C. Remain the same
D. None of these
5 The dot product of electric field intensity E and vector area A is called
A. Electric potential
B. Electric flux
C. Electric field
D. Magnetic field
6 The speed of randomly moving electrons depends upon
A. pressure
B. volume
C. temperature
D. mass
7 The conductivity of a superconductor is
A. Infinite
B. Very large
C. Very small
D. Zero
8 A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts
A. 1310 W
B. 670 W
C. 810 W
D. 1210 W
9 One moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is
A. 0.1 V
B. 8 V
C. 2 V
D. 0.5 V
10 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
A. 10μF
B. 20μF
C. 30μF
D. 15μF

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