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

Electric flux is defined by the relation

Question # 3

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 # 4

Which of the following represents an electric current?

Question # 5

Electron volt is the unit of.

Question # 6

One electron volt is equal to

Question # 7

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

Question # 8

The thermistors are usually made of

Question # 9

Which of the following does not obey ohm's law?

Question # 10

The graphical representation of ohm's law is

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

Potentiometer is more sensitive than voltmeter, because

Question # 13

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 # 14

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

Question # 15

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 # 16

If the length of the conductor is double and its cross sectional area is halved, its conductance will

Question # 17

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 # 18

A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is

Question # 19

The electric flux is linked with a surface will be maximum when

Question # 20

The conductivity of a superconductor is

Question # 21

A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?

Question # 22

Two electric bulbs of 200 W and 100 W have same voltage. If R1and R2be their resistance respectively then

Question # 23

The ohm's is defined as

Question # 24

Heating effect caused by an electric circuit is written

Question # 25

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

Question # 26

The unit of intensity of electric field is

Question # 27

The SI unit of electric flux is

Question # 28

The speed of randomly moving electrons depends upon

Question # 29

The nature of capacity of electrostatic capacitor depends on

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
2 The unit of intensity of electric field is
A. newton/coluomb
B. jule/coluomb
C. volt x metre
D. newton/metre
3 In a voltmeter the conduction takes place due to
A. Electrons only
B. Holes only
C. Electrons and holes
D. Electrons and ions
4 If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be
A. 6 ohm
B. 4 ohm
C. zero ohm
D. 1.33 ohm
5 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
6 What is the current is a 2 x 106ohm resistor having a potential difference of 2 x 103volts?
A. 10-1A
B. 10-2A
C. 10-4A
D. 1 mA
7 In a charged capacitor the energy is stored in
A. Both in positive and negative charges
B. Positive charges
C. The edges of the capacitor plates
D. The electric field between the plates
8 If electric and gravitational force on an electron in a uniform electric field will be
A. E=mg/q
B. E=q/mg
C. E=,g/q
D. E=qg/m
9 If the length of the conductor is double and its cross sectional area is halved, its conductance will
A. Increase four fold
B. Become one-fourth
C. Become one-half
D. Remains unchanged
10 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
A. Two
B. 1/2
C. Zero
D. 3/2

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