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

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 # 2

For two resistance wires joined in parallel, the resultant resistance is 6/5 ohm. When one of the resistance wire breaks, the effective resistance becomes 2 ohm. The resistance of the broken wire is

Question # 3

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

Question # 4

Which one of the following is the unit of electric field intensity

Question # 5

Ohm's law states that

Question # 6

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

Question # 7

The capacitance of a parallel plate capacitor depends upon

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

Heating effect caused by an electric circuit is written

Question # 10

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 # 11

Solar cell converts sunlight directly into

Question # 12

The electrode connected with the positive terminal of the current source is called

Question # 13

The potential difference across each resistance in series combination is

Question # 14

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

Question # 15

One coulomb of charge is created by

Question # 16

The resistance of an incandescent lamp is

Question # 17

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

Question # 18

The unit of intensity of electric field is

Question # 19

If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us

Question # 20

Physicist George Simon ohm was a

Question # 21

Surface density of charge is defined as

Question # 22

The SI unit of electric flux is

Question # 23

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

Question # 24

The substances whose resistance decreases with the increase in temperature these substances have coefficient of

Question # 25

Cause of heat production in a current carrying conductor is

Question # 26

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

Question # 27

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

Question # 28

Resistance of a conductor depends upon

Question # 29

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

Question # 30

The energy stored in a charge capacitor

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ECAT Class Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
2 A (100 W , 200 W) bulb is connected to a 160 V power supply. The power consumption would be
A. 64 W
B. 80 W
C. 100 W
D. 125 W
3 Consider a spherical shell of metal at he centre of which a positive point charge is kept
A. The electric filed is zero outside the shell
B. The electric field is zero everywhere
C. The electric field is zero in the region inside the shell
D. The electric field is non-zero in both regions outside and inside the shell
4 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
5 The energy stored in a charge capacitor
A. 1/2CV2
B. 1/2C2V
C. 1/2C/V2
D. None of these
6 Electric flux is defined by the relation
A. E.A.
B. E x A
C. E/A
D. none of these
7 The charge carriers in electrolyte are positive and negative
A. protons
B. electrons
C. ions
D. none of these
8 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
A. 25
B. 225
C. 625
D. 1250
9 Some charge is being given to a conductor. Then its potential
A. Is maximum at surface
B. Is maximum at centre
C. Is remain same throughout the conductor
D. Is maximum somewhere between surface and centre
10 Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is
A. 11.0 ohm
B. 1.0 ohm
C. 7.0 ohm
D. 3.0 ohm

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