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

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 # 2

The SI unit of electric field intensity is

Question # 3

The powers of tow electric bulbs are 100 W and 200 W. Both of them are joined with 220 V mains. The ratio of resistances of their filaments will be

Question # 4

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

Question # 5

The unit of resistance is

Question # 6

Physicist George Simon ohm was a

Question # 7

The potential difference across the conductors should be maintained constant by connecting the ends of wire to the terminal of a device called a source of

Question # 8

For two resistance wires joined in parallel, the resultant resistance is 6/5 ohm. When one of the resistance wire breaks, the effective resistance becomes 2 ohm. The resistance of the broken wire is

Question # 9

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

Question # 10

The speed of randomly moving electrons depends upon

Question # 11

In a building, there are 15 bulbs of 40 watts, 5 bulbs of 100 watts, 5 fans of 80 watts and a heater of 1 kilowatt. The voltage of the electric main is 220 volts. The minimum efficiency of the main fuse of the building will be

Question # 12

Battery is charged in motor cars, which is based on

Question # 13

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

Question # 14

The conductivity of a superconductor is

Question # 15

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

Question # 16

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 # 17

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

Question # 18

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

Question # 19

The resistance of a conductor does not depend on its

Question # 20

Surface density of charge is defined as

Question # 21

The electric flux from a closed surface

Question # 22

What is the current is a 2 x 106ohm resistor having a potential difference of 2 x 103volts?

Question # 23

The conventional current in a circuit is defined as " current which passes from a point at higher potential to a point at lower potential as if it represent a movement of

Question # 24

Heating effect caused by an electric circuit is written

Question # 25

Which of the following does not obey ohm's law?

Question # 26

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

Question # 27

One joule is equal to

Question # 28

The resistance of an incandescent lamp is

Question # 29

The SI unit of capacitance is

Question # 30

One coulomb per second is equal to

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
A. 7.20 N
B. 11.25 N
C. 22.50 N
D. 45.00
2 The charge per unit time through any cross-section of a conductor is called
A. capacitance
B. electric power
C. current
D. potential difference
3 The electric flux from a closed surface
A. Is independent of the shape of the surface
B. Depends on the charge enclosed by the surface
C. Both a and b
D. None of the above
4 If electric and gravitational force on an electron in a uniform electric field will be
A. E=mg/q
B. E=q/mg
C. E=,g/q
D. E=qg/m
5 The conventional current in a circuit is defined as " current which passes from a point at higher potential to a point at lower potential as if it represent a movement of
A. negative charges
B. positive charges
C. protons
D. electrons
6 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
7 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
8 Specific resistance of a wire depends upon
A. Length
B. Cross-section area
C. Mass
D. None
9 Battery is charged in motor cars, which is based on
A. Chemical effect
B. Magnetic effect
C. Electric effect
D. None
10
Question Image
A. 5μF
B. 10μF
C. 3μF
D. 6μF

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    fun day

    02 Mar 2023

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