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

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 # 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

The unit of resistance is

Question # 4

Two conductors having the same type of charges are connected by a conducting wire. There would not be any amount of charges on them if

Question # 5

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 # 6

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

Question # 7

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

Question # 8

The SI unit of electric flux is

Question # 9

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

Question # 10

The SI unit of current is

Question # 11

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

Question # 12

The unit of resistivity is

Question # 13

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

Question # 14

A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of 1 KV, its kinetic energy will be

Question # 15

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

Question # 16

The charge carriers in gases are

Question # 17

The capacity of a parallel plat capacitor depends on the

Question # 18

Ohm's law states that

Question # 19

In a voltmeter the conduction takes place due to

Question # 20

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 # 21

One joule is equal to

Question # 22

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

Question # 23

The electric intensity outside the two oppositely charged parallel metal plates is

Question # 24

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

Question # 25

A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J

Question # 26

The force between two chares 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become

Question # 27

Cause of heat production in a current carrying conductor is

Question # 28

A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The thermistors are usually made of
A. Metals with low temperature coefficient of resistivity
B. Metals with high temperature coefficient of resistivity
C. Metal oxides with high temperature coefficient of resistivity
D. Semi conducting materials having low temperature coefficient of resistivity
2 A 60 W bulb operates on 220 V supply. The current flowing through the bulb is
A. 11/3 A
B. 3 A
C. 3/11 A
D. 6
3 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
4 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
5 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
A. Coulomb's law
B. Gauss's law
C. Biot-Sarwat law
D. Ampere's law
6 The unit of intensity of electric field is
A. newton/coluomb
B. jule/coluomb
C. volt x metre
D. newton/metre
7 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
8 The electric intensity at infinite distance from the point charge will be
A. Infinite
B. Positive
C. Zero
D. Negative
9 The force of repulsion between two point charges is F, when these are at a distance 0.1 m apart. Now the point charges are replaced by sphere of radii 5 cm each having the same charge as that of the respective point charges. The distance between their centre is again kept 0.1 m ; then the force of repulsion will
A. Increase
B. Decrease
C. Remain F
D. Become 10F/9
10 The potential difference across each resistance in series combination is
A. same
B. different
C. zero
D. none of these

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