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

Capacitance of two or more capacitors

Question # 2

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

Question # 3

Electron volt is the unit of.

Question # 4

A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?

Question # 5

Ohm's law states that

Question # 6

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 # 7

The ohm's is defined as

Question # 8

In Pakistan electricity is supplied for domestic use at 220 V, it is supplied at 110 V in USA. If the resistance of a 60 W bulb for use in Pakistan is R, the resistance of a 60 W bulb for use in USA will be

Question # 9

Electric generators which convert mechanical energy into

Question # 10

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 # 11

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

Question # 12

A wire is bent into a ring of radius R is given a charge q. The magnitude of the electrical field at the centre of the ring is

Question # 13

Free electrons are

Question # 14

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

Question # 15

The statement "the electric force of repulsion or attraction between two point charges is directly proportional to the product of the charges and inversely proportional to square of the distance between them" refer to

Question # 16

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

Question # 17

The SI unit of electric flux is

Question # 18

A conducting wire is drawn to double its length. Final resistivity of the material will be

Question # 19

If a 40 watt light bulb burns for 2 hours. how much heat is generated

Question # 20

The charge per unit time through any cross-section of a conductor is called

Question # 21

Heating effect caused by an electric circuit is written

Question # 22

The dot product of electric field intensity E and vector area A is called

Question # 23

One joule is equal to

Question # 24

The resistance of an incandescent lamp is

Question # 25

Battery is charged in motor cars, which is based on

Question # 26

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

Question # 27

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

Question # 28

The resistivity of a substance depends upon the

Question # 29

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 # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The relation V = IR represents
A. Ampere law
B. Faraday's law
C. Ohm's law
D. Len's law
2 The energy stored in a charge capacitor
A. 1/2CV2
B. 1/2C2V
C. 1/2C/V2
D. None of these
3 The capacity of a parallel plat capacitor depends on the
A. Type to metal used
B. Thickness of plates
C. Potential applied across the plates
D. Separation between the plates
4 The unit of intensity of electric field is
A. newton/coluomb
B. jule/coluomb
C. volt x metre
D. newton/metre
5 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
6 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
7 The thermistors are usually made of
A. Metals with low temperature coefficient of resistivity
B. Metals with high temperature coefficient of resistivity
C. Metal oxides with high temperature coefficient of resistivity
D. Semi conducting materials having low temperature coefficient of resistivity
8 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
A. 0.1 watt
B. 1 watt
C. 10 watt
D. 100 watt
9 The fractional change in resistance per kelvin is known as
A. temperature coefficient
B. resistance coefficient
C. super temperature
D. critical temperature
10 The force of repulsion between two point charges is F, when these are at a distance 0.1 m apart. Now the point charges are replaced by sphere of radii 5 cm each having the same charge as that of the respective point charges. The distance between their centre is again kept 0.1 m ; then the force of repulsion will
A. Increase
B. Decrease
C. Remain F
D. Become 10F/9

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