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

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

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

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 # 6

Which of the following represents an electric current?

Question # 7

Potentiometer is more sensitive than voltmeter, because

Question # 8

The SI unit of electric flux is

Question # 9

If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is

Question # 10

Heating effect caused by an electric circuit is written

Question # 11

A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor

Question # 12

One coulomb of charge is created by

Question # 13

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 # 14

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 # 15

The nature of capacity of electrostatic capacitor depends on

Question # 16

The capacitance of a parallel plate capacitor depends upon

Question # 17

Electric generators which convert mechanical energy into

Question # 18

Capacitance of two or more capacitors

Question # 19

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

Question # 20

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

Question # 21

The SI unit of conductivity is

Question # 22

The electric field will be uniform

Question # 23

The SI unit of permitivity is

Question # 24

The ratio of the gravitational force Fgto the electrostatic force Febetween two electrons at the same distance apart is approximately

Question # 25

Resistor is a device which convert electric energy to

Question # 26

One moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is

Question # 27

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 # 28

If two bulbs one of 60 W and other of 100 W are connected in parallel, then which one of the following will flow more?

Question # 29

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

Question # 30

The energy stored in a charge capacitor

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
2
Question Image
A. 5μF
B. 10μF
C. 3μF
D. 6μF
3 The electric field due to an infinite long thin wire at a distance R varies as
A. 1/R
B. 1/R2
C. R
D. R2
4 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
A. 1840 KeV
B. 1/1840 KeV
C. 1 KeV
D. 920 KeV
5 The SI unit of capacitance is
A. Farad
B. Henry
C. Ohm
D. Volt
6 Equal charges are given to two spheres of different radii. The potential will
A. Be more on the smaller sphere
B. Be more on the bigger sphere
C. Be equal on both the sphere
D. Depend on the nature of the material of the sphere
7 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
A. 2 R
B. R
C. R/2
D. R/4
8 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
A. Zero
B. 10Ω
C. 1Ω
D. 0.10Ω
9 The SI unit of conductivity is
A. ohm-m
B. ohm-1m-1
C. ohm-m-1
D. ohm-1m
10 The conductivity of a superconductor is
A. Infinite
B. Very large
C. Very small
D. Zero

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