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

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 # 2

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

Question # 3

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

Question # 4

The relation between charge 'Q' and current 'I' is given by

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

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

Question # 9

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

Question # 10

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

Question # 11

Electric flux is defined by the relation

Question # 12

Equal charges are given to two spheres of different radii. The potential will

Question # 13

Resistor is a device which convert electric energy to

Question # 14

The fractional change in resistance per kelvin is known as

Question # 15

Electric generators which convert mechanical energy into

Question # 16

The electric field intensity at a point due to a point charge

Question # 17

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 # 18

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

Question # 19

The SI unit of conductivity is

Question # 20

The electric field will be uniform

Question # 21

One coulomb of charge is created by

Question # 22

The earth's potential is taken as

Question # 23

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

Question # 24

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

Question # 25

The SI unit of capacitance is

Question # 26

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 # 27

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

Question # 28

Ohm established a relation between

Question # 29

The statement "the electric force of repulsion or attraction between two point charges is directly proportional to the product of the charges and inversely proportional to square of the distance between them" refer to

Question # 30

The electric field due to an infinite long thin wire at a distance R varies as

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 A metal plate of thickness half the separation between the capacitor plates of capacitance C is inserted. The new capacitance is
A. C
B. C/2
C. Zero
D. 2C
2 Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity will be
A. 711μF
B. 611μF
C. 811μF
D. 511μF
3 The earth's potential is taken as
A. Negative
B. Positive
C. Zero
D. Infinite
4 One moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is
A. 0.1 V
B. 8 V
C. 2 V
D. 0.5 V
5 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
6 If the distance between the plates of a parallel plate condenser of capacity 10μF is doubled then new capacity will be
A. 5μF
B. 20μF
C. 10μF
D. 15μF
7 If the distance of separation between two chares is increased, the electrical potential energy of the system will
A. Increase
B. Decrease
C. May increase or decrease
D. Remain the same
8 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
9 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
10 The powers of tow electric bulbs are 100 W and 200 W. Both of them are joined with 220 V mains. The ratio of resistances of their filaments will be
A. 1 : 2
B. 2 : 1
C. 1 : 4
D. 4 : 1

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