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

A car battery has e.m.f 12 volt and internal resistance 5 x 10-2ohm. If it draws 60 ampere current, the terminal voltage of the battery will be

Question # 2

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

Question # 3

Free electrons are

Question # 4

An electric charge at rest is

Question # 5

The value of electrical constant of proportionality k is

Question # 6

If 2.2 kilowatt power is transmitted through a 10 ohm line at 22000 volt, the power loss in the form of heat will be

Question # 7

In a voltmeter the conduction takes place due to

Question # 8

An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be

Question # 9

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 # 10

Electric flux is defined by the relation

Question # 11

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

Question # 12

If the distance of separation between two chares is increased, the electrical potential energy of the system will

Question # 13

The speed of randomly moving electrons depends upon

Question # 14

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

Question # 15

The resistance of a conductor does not depend on its

Question # 16

The unit of conductance is

Question # 17

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 # 18

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

Question # 19

Resistor is a device which convert electric energy to

Question # 20

Heating effect caused by an electric circuit is written

Question # 21

The unit of intensity of electric field is

Question # 22

The fractional change in resistance per kelvin is known as

Question # 23

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 # 24

A certain charge liberates 0.8 g of oxygen. The same charge will liberate. how many g of silver?

Question # 25

Coulomb's force between two point charges depends upon

Question # 26

The substances whose resistance decreases with the increase in temperature these substances have coefficient of

Question # 27

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

Question # 28

A metal plate of thickness half the separation between the capacitor plates of capacitance C is inserted. The new capacitance is

Question # 29

A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, then

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is
A. Zero
B. 0.5Ω
C. 1.1Ω
D. 5.0Ω
2 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
3 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?
A. Zero
B. 5μC m-2
C. 20μC m-2
D. 8μC m-2
4 A certain charge liberates 0.8 g of oxygen. The same charge will liberate. how many g of silver?
A. 108 g
B. 10.8 g
C. 0.8 g
D. 108/0.8 g
5 The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as
A. voltmeters
B. resistance
C. electrode
D. current
6 A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?
A. 200 W
B. 302.5
C. 250 W
D. 350 W
7 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
8 If the two charges in Coulomb's law have double distance between them, then electric force
A. Becomes two-fold
B. Becomes four-fold
C. Remains the same
D. None of these
9 The liquid which conduct current is known as
A. heating effect
B. chemical energy
C. electrolyte
D. ohm's law
10 A 100 W, 200 V bulb is connected to a 160 volts supply. The actual power consumption would be
A. 64 W
B. 80 W
C. 100 W
D. 125 W

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