ECAT Pre Computer Science Chapter 12 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 12 Electrostatics

Try The MCQ's Test For ECAT Physics Chapter 12 Electrostatics

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ECAT Physics Chapter 12 Electrostatics

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Question # 1

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 # 2

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

Question # 3

One coulomb of charge is created by

Question # 4

The charge carriers in electrolyte are positive and negative

Question # 5

A (100 W , 200 W) bulb is connected to a 160 V power supply. The power consumption would be

Question # 6

The potential difference across each resistance in series combination is

Question # 7

Resistance of a conductor depends upon

Question # 8

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

Question # 9

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 # 10

Cause of heat production in a current carrying conductor is

Question # 11

The force between two chares 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become

Question # 12

The nature of capacity of electrostatic capacitor depends on

Question # 13

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

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
2 A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance
A. Increase k time
B. Decreases k times
C. Decreases 1/K times
D. Remains unchanged
3 The energy stored in a charge capacitor
A. 1/2CV2
B. 1/2C2V
C. 1/2C/V2
D. None of these
4 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
A. negative charges
B. positive charges
C. protons
D. electrons
5 Free electrons are
A. tightly bound
B. fixed
C. loosely bound
D. tightly fixed
6 The SI unit of electric flux is
A. Weber
B. Nm2C-1
C. NmC-1
D. Nm-2C
7 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
A. Coulomb's law
B. Gauss's law
C. Biot-Sarwat law
D. Ampere's law
8 A certain charge liberates 0.8 g of oxygen. The same charge will liberate. how many g of silver?
A. 108 g
B. 10.8 g
C. 0.8 g
D. 108/0.8 g
9 In a voltmeter the conduction takes place due to
A. Electrons only
B. Holes only
C. Electrons and holes
D. Electrons and ions
10 A 60 W bulb operates on 220 V supply. The current flowing through the bulb is
A. 11/3 A
B. 3 A
C. 3/11 A
D. 6

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