ECAT Pre General Science Physics Chapter 12 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 12 Electrostatics

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

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ECAT Pre General Science Physics Chapter 12 Electrostatics

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Question # 1

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

Question # 2

Surface density of charge is defined as

Question # 3

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 # 4

In a voltmeter the conduction takes place due to

Question # 5

In a building, there are 15 bulbs of 40 watts, 5 bulbs of 100 watts, 5 fans of 80 watts and a heater of 1 kilowatt. The voltage of the electric main is 220 volts. The minimum efficiency of the main fuse of the building will be

Question # 6

The speed of randomly moving electrons depends upon

Question # 7

A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance

Question # 8

The potential difference across the conductors should be maintained constant by connecting the ends of wire to the terminal of a device called a source of

Question # 9

The ohm's is defined as

Question # 10

If electric and gravitational force on an electron in a uniform electric field will be

Question # 11

Two point charges A and B separated by a distance R attract each other with a force of 12 x 10-3N. The force between A and B when the charges on them are doubled and distance is halved

Question # 12

One electron volt is equal to

Question # 13

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

Question # 14

The earth's potential is taken as

Question # 15

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

Question # 16

If 2.2 kilowatt power is transmitted through a 10 ohm line at 22000 volt, the power loss in the form of heat will be

Question # 17

An electric charge at rest is

Question # 18

Solar cell converts sunlight directly into

Question # 19

The charge carriers in gases are

Question # 20

A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. The quantity that remains unchanged is

Question # 21

The liquid which conduct current is known as

Question # 22

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

Question # 23

At ordinary temperature, an increase in temperature increases the conductivity of

Question # 24

The colour sequence in a carbon resistor in red, brown, orange and silver. The resistance of the resistor is

Question # 25

Resistance of a conductor depends upon

Question # 26

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

Question # 27

The value of electrical constant of proportionality k is

Question # 28

Electric flux is defined by the relation

Question # 29

The nature of capacity of electrostatic capacitor depends on

Question # 30

Ohm's law states that

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The charge per unit time through any cross-section of a conductor is called
A. capacitance
B. electric power
C. current
D. potential difference
2 Which one of the following has larger value of relative permitivity Erat room temperature?
A. Vaccum
B. Air
C. Glass
D. Water
3 A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy
A. 200 J
B. 100 J
C. 1000 J
D. 400 J
4 A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J
A. 5
B. 0.5
C. 0.005
D. 50
5 If 2.2 kilowatt power is transmitted through a 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
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
A. Zero
B. 10Ω
C. 1Ω
D. 0.10Ω
7 The energy stored in a charge capacitor
A. 1/2CV2
B. 1/2C2V
C. 1/2C/V2
D. None of these
8 In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called
A. Time constant
B. Decay constant
C. None of these
D. All of above
9 Three resistors of resistance R each are combined in various ways. Which of the following cannot be obtained?
A. 3RΩ
B. 2R/4Ω
C. R/3Ω
D. 2R/3Ω
10 Free electrons are
A. tightly bound
B. fixed
C. loosely bound
D. tightly fixed

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