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

Resistor is a device which convert electric energy to

Question # 2

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 # 3

The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is

Question # 4

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

Question # 5

Ohm is the unit of

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

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

Question # 8

A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?

Question # 9

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 # 10

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 # 11

Solar cell converts sunlight directly into

Question # 12

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

Question # 13

Heating effect caused by an electric circuit is written

Question # 14

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 # 15

The resistance of a conductor does not depend on its

Question # 16

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

Question # 17

The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is

Question # 18

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

Question # 19

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

Question # 20

In a charged capacitor the energy is stored in

Question # 21

Battery is charged in motor cars, which is based on

Question # 22

Electron volt is the unit of

Question # 23

Electric flux is defined by the relation

Question # 24

In a voltmeter the conduction takes place due to

Question # 25

If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be

Question # 26

A charge Q is divided into two parts q and Q - q and separated by a distance R. The force of repulsion between them will be maximum when

Question # 27

Free electrons are

Question # 28

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

Question # 29

The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is

Question # 30

The SI unit of permitivity is

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The substances whose resistance decreases with the increase in temperature these substances have coefficient of
A. positive temperature
B. negative temperature
C. absolute temperature
D. zero temperature
2 Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is
A. 11.0 ohm
B. 1.0 ohm
C. 7.0 ohm
D. 3.0 ohm
3 An alpha particle is accelerated through a potential difference of 106volt. Its kinetic energy will be
A. 1 MeV
B. 2 MeV
C. 4 MeV
D. 8 MeV
4 The speed of randomly moving electrons depends upon
A. pressure
B. volume
C. temperature
D. mass
5 In a voltmeter the conduction takes place due to
A. Electrons only
B. Holes only
C. Electrons and holes
D. Electrons and ions
6 An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be
A. V/e
B. eV
C. e/V
D. V
7 One moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is
A. 0.1 V
B. 8 V
C. 2 V
D. 0.5 V
8 A 60 W bulb operates on 220 V supply. The current flowing through the bulb is
A. 11/3 A
B. 3 A
C. 3/11 A
D. 6
9 The SI unit of electric field intensity is
A. CN-1
B. NC-1or Vm-1
C. JC-1
D. AV-1
10 The electric flux is linked with a surface will be maximum when
A. The surface is held parallel to the electric field
B. The surface is held perpendicular to the electric field
C. The surface makes an angle of 45° with the electric field
D. All of the above

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