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 unit of intensity of electric field is

Question # 2

Which one of the following has larger value of relative permitivity Erat room temperature?

Question # 3

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

Question # 4

Coulomb force, when any material medium is placed between two charges

Question # 5

If the distance of separation between two chares is increased, the electrical potential energy of the system will

Question # 6

Heating effect caused by an electric circuit is written

Question # 7

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 # 8

Surface density of charge is defined as

Question # 9

The SI unit of current is

Question # 10

Resistor is a device which convert electric energy to

Question # 11

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

Question # 12

The charge carriers in gases are

Question # 13

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

Question # 14

The SI unit of conductivity is

Question # 15

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

Question # 16

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

Question # 17

The minimum charge on any object can not be less than

Question # 18

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 # 19

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

Question # 20

The nature of capacity of electrostatic capacitor depends on

Question # 21

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 # 22

If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be

Question # 23

Calculate the amount of charge flowing in 2 minutes in a wire of resistance 10Ωwhen a potential difference of 20 V is applied between its ends

Question # 24

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

Question # 25

The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10-19N, is

Question # 26

The conductivity of a superconductor is

Question # 27

Battery is charged in motor cars, which is based on

Question # 28

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 # 29

Ohm is the unit of

Question # 30

The unit of resistivity is

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
2 The dot product of electric field intensity E and vector area A is called
A. Electric potential
B. Electric flux
C. Electric field
D. Magnetic field
3 If the two charges in Coulomb's law have double distance between them, then electric force
A. Becomes two-fold
B. Becomes four-fold
C. Remains the same
D. None of these
4 The fractional change in resistance per kelvin is known as
A. temperature coefficient
B. resistance coefficient
C. super temperature
D. critical temperature
5 Physicist George Simon ohm was a
A. German physical
B. French physicist
C. Chinese physicist
D. Russian physicist
6 The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is
A. 10 KJ
B. 5 KJ
C. 2 KJ
D. 1 KJ
7 The minimum charge on any object can not be less than
A. 1.6 x 10-19C
B. 3.2 x 10-19C
C. 1.0 C
D. 4.8 x 10-19C
8 Resistance of a conductor depends upon
A. the quantity of current passing through it
B. the voltage applied between its end
C. its dimensions, physical state and nature of its material
D. all of the above
9 The SI unit of electric field intensity is
A. CN-1
B. NC-1or Vm-1
C. JC-1
D. AV-1
10 An alpha particle is accelerated through a potential difference of 106volt. Its kinetic energy will be
A. 1 MeV
B. 2 MeV
C. 4 MeV
D. 8 MeV

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