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

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

Question # 2

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

Question # 3

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 # 4

Electric flux is defined by the relation

Question # 5

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

Question # 6

Coulomb's force between two point charges depends upon

Question # 7

A condenser of capacity 50μF is charged to 10 V.The energy stored is

Question # 8

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

Question # 9

If 2.2 kilowatt power is transmitted through 1 10 ohm line at 22000 volt, the power loss in the form of heat will be

Question # 10

An electric charge at rest is

Question # 11

The resistance of an incandescent lamp is

Question # 12

If an electron of charge 'e' is accelerated through a potential difference V., it will acquire energy

Question # 13

The resistivity of a substance depends upon the

Question # 14

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 # 15

Some charge is being given to a conductor. Then its potential

Question # 16

Ohm is the unit of

Question # 17

Electric generators which convert mechanical energy into

Question # 18

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

Question # 19

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 # 20

Solar cell converts sunlight directly into

Question # 21

The unit of resistance is

Question # 22

The relation V = IR represents

Question # 23

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 # 24

If a charged spherical conductor of radius 10 cm has potential V at a point distance 5 cm from its centre, then the potential at a point distance 15 cm from the centre will be

Question # 25

The SI unit of electric flux is

Question # 26

If a 40 watt light bulb burns for 2 hours. how much heat is generated

Question # 27

A uniform resistance wire of Length L and diameter d has a resistance R. Another wire of same material has length, 4L and diameter 2d, the resistance will be

Question # 28

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

Question # 29

The capacity of a parallel plat capacitor depends on the

Question # 30

The resistance of a conductor does not depend on its

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Sr.# Question Answer
1 The fractional change in resistance per kelvin is known as
A. temperature coefficient
B. resistance coefficient
C. super temperature
D. critical temperature
2 The liquid which conduct current is known as
A. heating effect
B. chemical energy
C. electrolyte
D. ohm's law
3 The SI unit of electric flux is
A. Weber
B. Nm2C-1
C. NmC-1
D. Nm-2C
4 When three identical bulbs of 60 watt, 200 volt rating are connected in series to a 200 volt supply, the power drawn by them will be
A. 180 watt
B. 10 watt
C. 20 watt
D. 60 watt
5 The SI unit of electric field intensity is
A. CN-1
B. NC-1or Vm-1
C. JC-1
D. AV-1
6 The conductivity of a superconductor is
A. Infinite
B. Very large
C. Very small
D. Zero
7 Battery is charged in motor cars, which is based on
A. Chemical effect
B. Magnetic effect
C. Electric effect
D. None
8 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
9 The SI unit of permitivity is
A. Nm2C2
B. N-1m-2C2
C. NmC2
D. Nm2C-1
10 A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes
A. 2R
B. 4R
C. 16R
D. Zero

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