ECAT Pre General Science Physics Chapter 12 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 12 Electrostatics

Try The MCQ's Test For ECAT Pre General Science Physics Chapter 12 Electrostatics

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ECAT Pre General Science Physics Chapter 12 Electrostatics

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Question # 1

The SI unit of permitivity is

Question # 2

Electron volt is the unit of

Question # 3

The potential difference across each resistance in series combination is

Question # 4

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

Question # 5

The ohm's is defined as

Question # 6

A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor

Question # 7

Electric potential of earth is taken to be zero because the earth is good

Question # 8

The conductivity of a superconductor is

Question # 9

The colour sequence in a carbon resistor in red, brown, orange and silver. The resistance of the resistor is

Question # 10

The electric flux from a closed surface

Question # 11

One coulomb per second is equal to

Question # 12

The ratio of the gravitational force Fgto the electrostatic force Febetween two electrons at the same distance apart is approximately

Question # 13

The resistivity of a substance depends upon the

Question # 14

The minimum charge on any object can not be less than

Question # 15

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 # 16

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

Question # 17

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 # 18

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 # 19

Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity will be

Question # 20

A conducting wire is drawn to double its length. Final resistivity of the material will be

Question # 21

The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is

Question # 22

When three identical bulbs of 60 watt, 200 volt rating are connected in series to a 200 volt supply, the power drawn by them will be

Question # 23

A 100 W, 200 V bulb is connected to a 160 volts supply. The actual power consumption would be

Question # 24

The thermistors are usually made of

Question # 25

If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is

Question # 26

Ohm established a relation between

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

If the two charges in Coulomb's law have double distance between them, then electric force

Question # 29

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 # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The concept of field theory was put forward by
A. Franklin
B. Kepler
C. Oersted
D. Michael Faraday
2 Cause of heat production in a current carrying conductor is
A. Collisions of free electrons with one another
B. High drift speed of free electrons
C. Collisions of free electrons with atoms or ions of conductor
D. High resistance value
3 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
4 Electric potential of earth is taken to be zero because the earth is good
A. Semiconductor
B. Conductor
C. Insulator
D. Dielectric
5 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
6 Current provided by a battery is maximum when
A. Internal resistance equal to external resistance
B. Internal resistance is greater than external resistance
C. Internal resistance is less then external resistance
D. None of these
7 Force acting upon a charged particle kept between the plates of a charged condenser if F. IF one of the plates of the condenser is removed, force acting on the same will become
A. Zero
B. F/2
C. F
D. 2F
8 The electrode connected with the positive terminal of the current source is called
A. cathode
B. anode
C. electrolyte
D. position
9 A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance
A. Increase k time
B. Decreases k times
C. Decreases 1/K times
D. Remains unchanged
10 What is the current is a 2 x 106ohm resistor having a potential difference of 2 x 103volts?
A. 10-1A
B. 10-2A
C. 10-4A
D. 1 mA

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