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 electric flux is linked with a surface will be maximum when

Question # 2

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

Question # 3

Capacitance of two or more capacitors

Question # 4

A point charge Q is placed at the mid-point of a line joining two charges. 4q and q. if the net force on charge q is zero. then Q must be equal to

Question # 5

The electric flux from a closed surface

Question # 6

Heating effect caused by an electric circuit is written

Question # 7

In a charged capacitor the energy is stored in

Question # 8

Magnetic effect at a point caused due to flow a current depend upon the

Question # 9

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

Question # 10

Consider a spherical shell of metal at he centre of which a positive point charge is kept

Question # 11

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 # 12

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

Question # 13

A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts

Question # 14

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

Question # 15

The nature of capacity of electrostatic capacitor depends on

Question # 16

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

Question # 17

Current provided by a battery is maximum when

Question # 18

The unit of resistance is

Question # 19

The earth's potential is taken as

Question # 20

The resistance of the given conductor can be increased by

Question # 21

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

Question # 22

Resistor is a device which convert electric energy to

Question # 23

A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?

Question # 24

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 # 25

In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes

Question # 26

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

Question # 27

The relation V = IR represents

Question # 28

A point charge A of charge +4μC and another B of charge -1μC are placed in air at a distance 1 m apart. Then the distance of the point on the line joining the charge B, where the resultant electric field is zero, is (in m)

Question # 29

Ohm's law states that

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The SI unit of electric field intensity is
A. CN-1
B. NC-1or Vm-1
C. JC-1
D. AV-1
2 The electrode connected with the positive terminal of the current source is called
A. cathode
B. anode
C. electrolyte
D. position
3 The current through a metallic conductor is due to the motion of
A. protons
B. neutrons
C. electrons
D. free electrons
4 The earth's potential is taken as
A. Negative
B. Positive
C. Zero
D. Infinite
5 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
6 The ratio of the gravitational force Fgto the electrostatic force Febetween two electrons at the same distance apart is approximately
A. 9.8
B. 24 x 1019
C. 24 x 1042
D. 24 x 10-44
7 The minimum charge on any object can not be less than
A. 1.6 x 10-19C
B. 3.2 x 10-19C
C. 1.0 C
D. 4.8 x 10-19C
8 Thermocouple is an arrangement of two different metals
A. To convert heat energy in to electrical energy
B. To produce more heat
C. To convert heat energy into chemical energy
D. To convert electric energy in to heat energy
9 The relation V = IR represents
A. Ampere law
B. Faraday's law
C. Ohm's law
D. Len's law
10 In a Milikian's oil drop experiment the charge on an oil drop is calculated to be 6.35 x 10-19C. The number of excess electrons on the drop is
A. 3.9
B. 4
C. 4.2
D. 6

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