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

In a building, there are 15 bulbs of 40 watts, 5 bulbs of 100 watts, 5 fans of 80 watts and a heater of 1 kilowatt. The voltage of the electric main is 220 volts. The minimum efficiency of the main fuse of the building will be

Question # 2

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

Question # 3

The SI unit of permitivity is

Question # 4

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

Question # 5

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

Question # 6

The unit of resistance is

Question # 7

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

Question # 8

The current through a metallic conductor is due to the motion of

Question # 9

A closed surface contains two equal and opposite charges. The net electric flux from the surface will be

Question # 10

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 # 11

The fractional change in resistance per kelvin is known as

Question # 12

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

Question # 13

The charge carriers in gases are

Question # 14

The ohm's is defined as

Question # 15

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

Question # 16

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 # 17

Physicist George Simon ohm was a

Question # 18

The relation V = IR represents

Question # 19

The minimum charge on any object can not be less than

Question # 20

Ohm established a relation between

Question # 21

Coulomb's force between two point charges depends upon

Question # 22

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 # 23

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

Question # 24

Resistor is a device which convert electric energy to

Question # 25

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 # 26

If a charged spherical conductor of radius 10 cm has potential V at a point distance 5 cm from its centre, then the potential at a point distance 15 cm from the centre will be

Question # 27

The nature of capacity of electrostatic capacitor depends on

Question # 28

Three resistors of resistance R each are combined in various ways. Which of the following cannot be obtained?

Question # 29

Electric flux is defined by the relation

Question # 30

Electron volt is the unit of.

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The conductivity of a superconductor is
A. Infinite
B. Very large
C. Very small
D. Zero
2 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
A. Two
B. 1/2
C. Zero
D. 3/2
3 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
4 In a building, there are 15 bulbs of 40 watts, 5 bulbs of 100 watts, 5 fans of 80 watts and a heater of 1 kilowatt. The voltage of the electric main is 220 volts. The minimum efficiency of the main fuse of the building will be
A. 0.4 A
B. 11.4 A
C. 9.8 A
D. 10.6 A
5 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
A. 1.92 N
B. 19.2 N
C. 12 N
D. 0.192 N
6 Consider a spherical shell of metal at he centre of which a positive point charge is kept
A. The electric filed is zero outside the shell
B. The electric field is zero everywhere
C. The electric field is zero in the region inside the shell
D. The electric field is non-zero in both regions outside and inside the shell
7 Equal charges are given to two spheres of different radii. The potential will
A. Be more on the smaller sphere
B. Be more on the bigger sphere
C. Be equal on both the sphere
D. Depend on the nature of the material of the sphere
8 For two resistance wires joined in parallel, the resultant resistance is 6/5 ohm. When one of the resistance wire breaks, the effective resistance becomes 2 ohm. The resistance of the broken wire is
A. 3/5 ohm
B. 2 ohm
C. 6/5 ohm
D. 3 ohm
9 At ordinary temperature, an increase in temperature increases the conductivity of
A. Conductor
B. Semiconductor
C. Insulator
D. Alloy
10 Specific resistance of a wire depends upon
A. Length
B. Cross-section area
C. Mass
D. None

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    fun day

    02 Mar 2023

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    15 Feb 2019

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