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

The speed of randomly moving electrons depends upon

Question # 2

The graphical representation of ohm's law is

Question # 3

An electric dipole is at the centre of a hollow sphere of radius r. The total normal electric flux through the sphere is (here Q is the charge and d is the distance between the two charges of the dipole)

Question # 4

The electric intensity at infinite distance from the point charge will be

Question # 5

When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to

Question # 6

The concept of field theory was put forward by

Question # 7

The electric field will be uniform

Question # 8

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

Question # 9

A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes

Question # 10

106electrons are moving through a wire per second, the current developed is

Question # 11

Battery is charged in motor cars, which is based on

Question # 12

The unit of resistivity is

Question # 13

The SI unit of permitivity is

Question # 14

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

Question # 15

One joule is equal to

Question # 16

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 # 17

What is the current is a 2 x 106ohm resistor having a potential difference of 2 x 103volts?

Question # 18

Surface density of charge is defined as

Question # 19

A hollow insulated conduction sphere is given a positive charge of 10μC. What will be the electric field at the centre of the sphere if its radius is 2 meters?

Question # 20

The SI unit of current is

Question # 21

A car battery has e.m.f 12 volt and internal resistance 5 x 10-2ohm. If it draws 60 ampere current, the terminal voltage of the battery will be

Question # 22

Capacitance of two or more capacitors

Question # 23

The SI unit of electric flux is

Question # 24

If a 40 watt light bulb burns for 2 hours. how much heat is generated

Question # 25

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

Question # 26

A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy

Question # 27

A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts

Question # 28

The minimum charge on any object can not be less than

Question # 29

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

Question # 30

The resistance of a conductor does not depend on its

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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?
A. 60 W bulb
B. 100 W bulb
C. Both equally
D. None of these
2 The SI unit of capacitance is
A. Farad
B. Henry
C. Ohm
D. Volt
3 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
4 When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates
A. Decreases
B. Increases
C. No change
D. May increase or decresase
5 Which of the following does not obey ohm's law?
A. Copper
B. Al
C. Diode
D. None
6 The SI unit of electric flux is
A. Weber
B. Nm2C-1
C. NmC-1
D. Nm-2C
7 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
A. Zero
B. F/2
C. F
D. 2F
8 Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be
A. 0.52 A
B. 1 mA
C. 0.7 mA
D. 1.4 A
9 If 2.2 kilowatt power is transmitted through 1 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
10 The unit of resistance is
A. volt
B. ampere
C. ohm
D. coat

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