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 thermistors are usually made of

Question # 2

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

Question # 3

Resistor is a device which convert electric energy to

Question # 4

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

Question # 5

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

Question # 6

The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as

Question # 7

The resistivity of a substance depends upon the

Question # 8

The charge carriers in electrolyte are positive and negative

Question # 9

The charge carriers in gases are

Question # 10

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

Question # 11

A piece of fuse wire melts when a current of 15 ampere flows through it. With this current. If it dissipates 22.5 W, the resistance of fuse wire will be

Question # 12

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

Question # 13

A 60 W bulb operates on 220 V supply. The current flowing through the bulb is

Question # 14

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

Question # 15

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

Question # 16

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 # 17

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 # 18

The SI unit of current is

Question # 19

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

Question # 20

Which of the following represents an electric current?

Question # 21

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 # 22

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

Question # 23

The conductivity of a superconductor is

Question # 24

The SI unit of electric field intensity is

Question # 25

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

Question # 26

If electric and gravitational force on an electron in a uniform electric field will be

Question # 27

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

Question # 28

Electric generators which convert mechanical energy into

Question # 29

The electric flux from a closed surface

Question # 30

The ohm's is defined as

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The electric flux from a closed surface
A. Is independent of the shape of the surface
B. Depends on the charge enclosed by the surface
C. Both a and b
D. None of the above
2 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
3 The value of electrical constant of proportionality k is
A. 9 x 109Nm2C-2
B. 9 x 10-9Nm2C-2
C. 9 x 1010Nm2C2
D. 9.85 x 10-12N-1C-2
4 Coulomb's force between two point charges depends upon
A. Magnitude of charges
B. Distance between them
C. Medium in which they are located
D. All of the above
5 A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. The quantity that remains unchanged is
A. Charge Q
B. Potential V
C. Capacity
D. Energy U
6 A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?
A. Electric potential at the surface of the cube is zero
B. Electric potential within the cube is zero
C. Electric filed is normal to the surface of the cube
D. Electric filed varies within the cube
7 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
8 Electric flux is defined by the relation
A. E.A.
B. E x A
C. E/A
D. none of these
9 In a voltmeter the conduction takes place due to
A. Electrons only
B. Holes only
C. Electrons and holes
D. Electrons and ions
10 Which one of the following causes production of heat when current is set up in a wire?
A. Fall of electrons from higher orbits to lower orbits
B. Inter-atomic collisions
C. Inter-electron collisions
D. Collisions of conduction electron with atoms

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