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

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 # 2

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

Question # 3

The electric lines of force are

Question # 4

Two conductors having the same type of charges are connected by a conducting wire. There would not be any amount of charges on them if

Question # 5

The resistance of the given conductor can be increased by

Question # 6

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

Question # 7

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

Question # 8

Physicist George Simon ohm was a

Question # 9

The resistance of a conductor does not depend on its

Question # 10

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

Question # 11

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

Question # 12

When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to

Question # 13

The unit of intensity of electric field is

Question # 14

A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. The quantity that remains unchanged is

Question # 15

Coulomb's force between two point charges depends upon

Question # 16

The charge carriers in electrolyte are positive and negative

Question # 17

A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes

Question # 18

In a charged capacitor the energy is stored in

Question # 19

The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10-19N, is

Question # 20

Surface density of charge is defined as

Question # 21

Current provided by a battery is maximum when

Question # 22

Electron volt is the unit of.

Question # 23

A 10 F capacitor is charged to a potential difference of 50 V and is connected to another uncharged capacitor in parallel. Now the common potential difference becomes 20 volt.The capacitance of second capacitor is

Question # 24

The liquid which conduct current is known as

Question # 25

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

Question # 26

Which of the following represents an electric current?

Question # 27

Thermocouple is an arrangement of two different metals

Question # 28

The resistance of an incandescent lamp is

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The SI unit of permitivity is
A. Nm2C2
B. N-1m-2C2
C. NmC2
D. Nm2C-1
2 Electric generators which convert mechanical energy into
A. solar energy
B. thermal energy
C. kinetic energy
D. electrical energy
3 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
4 Specific resistance of a wire depends upon
A. Length
B. Cross-section area
C. Mass
D. None
5 Electron volt is the unit of.
A. Potential difference
B. Energy
C. Resistance
D. Capacitance
6 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
7 The SI unit of electric field intensity is
A. CN-1
B. NC-1or Vm-1
C. JC-1
D. AV-1
8 The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is
A. 10 KJ
B. 5 KJ
C. 2 KJ
D. 1 KJ
9 The fractional change in resistance per kelvin is known as
A. temperature coefficient
B. resistance coefficient
C. super temperature
D. critical temperature
10 At ordinary temperature, an increase in temperature increases the conductivity of
A. Conductor
B. Semiconductor
C. Insulator
D. Alloy

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