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

Consider a spherical shell of metal at he centre of which a positive point charge is kept

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

A metal plate of thickness half the separation between the capacitor plates of capacitance C is inserted. The new capacitance is

Question # 6

In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes

Question # 7

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

Question # 8

If we increase the distance between two plates of the capacitor, the capacitance will

Question # 9

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

Question # 10

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

Question # 11

A closed surface contains two equal and opposite charges. The net electric flux from the surface will be

Question # 12

The resistivity of a substance depends upon the

Question # 13

Ohm established a relation between

Question # 14

The conductivity of a superconductor is

Question # 15

Free electrons are

Question # 16

The fractional change in resistance per kelvin is known as

Question # 17

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

Question # 18

Coulomb's force between two point charges depends upon

Question # 19

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

Question # 20

One coulomb per second is equal to

Question # 21

Capacitance of two or more capacitors

Question # 22

The graphical representation of ohm's law is

Question # 23

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 # 24

The resistance of the given conductor can be increased by

Question # 25

The dot product of electric field intensity E and vector area A is called

Question # 26

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

Question # 27

A current of 1.6 A is passed through a solution of CuSO4. How many Cu2+ions are liberated in one minute?

Question # 28

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

Question # 29

Resistance of a conductor depends upon

Question # 30

A uniform resistance wire of Length L and diameter d has a resistance R. Another wire of same material has length, 4L and diameter 2d, the resistance will be

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 If an electron of charge 'e' is accelerated through a potential difference V., it will acquire energy
A. Ve
B. V/e
C. e/V
D. 2Ve
2 The unit of conductance is
A. ohm
B. meter
C. mho
D. ohm-meter
3 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
4 Ohm is the unit of
A. current
B. capacitance
C. energy
D. resistance
5 Resistor is a device which convert electric energy to
A. Heat energy
B. Chemical energy
C. Elastic energy
D. All of the above
6 A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is
A. Zero
B. 0.5Ω
C. 1.1Ω
D. 5.0Ω
7 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
8 Two point charge +3μC and +8μC repel each other with a force of 40 N. If a charge of -5μC is added to each of them, then the force between then will become
A. -10 N
B. +10 N
C. +20 N
D. -20 N
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
A. 2 R
B. R/4
C. R/2
D. R
10 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

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