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

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

Question # 2

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

Question # 3

The electric flux from a closed surface

Question # 4

The minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is

Question # 5

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

Question # 6

Cause of heat production in a current carrying conductor is

Question # 7

Solar cell converts sunlight directly into

Question # 8

Which one of the following causes production of heat when current is set up in a wire?

Question # 9

The unit of resistivity is

Question # 10

Resistor is a device which convert electric energy to

Question # 11

The SI unit of conductivity is

Question # 12

Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is

Question # 13

An electric dipole is at the centre of a hollow sphere of radius r. The total normal electric flux through the sphere is (here Q is the charge and d is the distance between the two charges of the dipole)

Question # 14

The charge carriers in electrolyte are positive and negative

Question # 15

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

Question # 16

The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is

Question # 17

The capacity of a parallel plat capacitor depends on the

Question # 18

The nature of capacity of electrostatic capacitor depends on

Question # 19

Free electrons are

Question # 20

Coulomb's force between two point charges depends upon

Question # 21

The charge per unit time through any cross-section of a conductor is called

Question # 22

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 # 23

The thermistors are usually made of

Question # 24

Heating effect caused by an electric circuit is written

Question # 25

Ohm established a relation between

Question # 26

In a charged capacitor the energy is stored in

Question # 27

At ordinary temperature, an increase in temperature increases the conductivity of

Question # 28

The conductivity of a superconductor is

Question # 29

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

Question # 30

In a voltmeter the conduction takes place due to

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Sr.# Question Answer
1 If we increase the distance between two plates of the capacitor, the capacitance will
A. Increase
B. Decrease
C. Remain same
D. First increase then decrease
2 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
3 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
A. q = Q/4
B. q = Q/2
C. q = !
D. None of these
4 One electron volt is equal to
A. 1.6 x 1019eV
B. 6.25 x 1018 eV
C. 1.6 x 1018 eV
D. 6.25 x 1019eV
5 A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy
A. 200 J
B. 100 J
C. 1000 J
D. 400 J
6 Two electric bulbs of 200 W and 100 W have same voltage. If R1and R2be their resistance respectively then
A. R1= 2R2
B. R2= 2R1
C. R2 = 4R1
D. R1= 4R2
7 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
8 At ordinary temperature, an increase in temperature increases the conductivity of
A. Conductor
B. Semiconductor
C. Insulator
D. Alloy
9 A (100 W , 200 W) bulb is connected to a 160 V power supply. The power consumption would be
A. 64 W
B. 80 W
C. 100 W
D. 125 W
10 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

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