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

Heating effect caused by an electric circuit is written

Question # 2

The thermistors are usually made of

Question # 3

Force acting upon a charged particle kept between the plates of a charged condenser if F. IF one of the plates of the condenser is removed, force acting on the same will become

Question # 4

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 # 5

The resistance of the given conductor can be increased by

Question # 6

Electron volt is the unit of.

Question # 7

A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, then

Question # 8

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

Question # 9

Physicist George Simon ohm was a

Question # 10

Which of the following represents an electric current?

Question # 11

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 # 12

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 # 13

One coulomb per second is equal to

Question # 14

The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is

Question # 15

Magnetic effect at a point caused due to flow a current depend upon the

Question # 16

The conductivity of a superconductor is

Question # 17

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

Question # 18

If an electron of charge 'e' is accelerated through a potential difference V., it will acquire energy

Question # 19

Battery is charged in motor cars, which is based on

Question # 20

The electric lines of force are

Question # 21

Resistance of a conductor depends upon

Question # 22

The fractional change in resistance per kelvin is known as

Question # 23

The resistance of a conductor does not depend on its

Question # 24

One electron volt is equal to

Question # 25

Surface density of charge is defined as

Question # 26

Current provided by a battery is maximum when

Question # 27

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 # 28

The liquid which conduct current is known as

Question # 29

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 # 30

The SI unit of capacitance is

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes
A. Four-fold
B. One-half
C. One-fourth
D. Zero
2 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
3 If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is
A. one ohm
B. one joule
C. one volt
D. one ampere
4 Two electric bulbs of 200 W and 100 W have same voltage. If R1and R2be their resistance respectively then
A. R1= 2R2
B. R2= 2R1
C. R2 = 4R1
D. R1= 4R2
5 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
A. 2 R
B. R/4
C. R/2
D. R
6 A conducting wire is drawn to double its length. Final resistivity of the material will be
A. Double of the original one
B. Half of the original one
C. One fourth of the original one
D. Same as original one
7 The liquid which conduct current is known as
A. heating effect
B. chemical energy
C. electrolyte
D. ohm's law
8 A charge Q is divided into two parts q and Q - q and separated by a distance R. The force of repulsion between them will be maximum when
A. q = Q/4
B. q = Q/2
C. q = !
D. None of these
9 Thermocouple is an arrangement of two different metals
A. To convert heat energy in to electrical energy
B. To produce more heat
C. To convert heat energy into chemical energy
D. To convert electric energy in to heat energy
10 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
A. 0.4 A
B. 11.4 A
C. 9.8 A
D. 10.6 A

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