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 two bulbs one of 60 W and other of 100 W are connected in parallel, then which one of the following will flow more?

Question # 2

The speed of randomly moving electrons depends upon

Question # 3

The ohm's is defined as

Question # 4

A current of 1.6 A is passed through a solution of CuSO4. How many Cu2+ions are liberated in one minute?

Question # 5

106electrons are moving through a wire per second, the current developed is

Question # 6

Electron volt is the unit of

Question # 7

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

Question # 8

An alpha particle is accelerated through a potential difference of 106volt. Its kinetic energy will be

Question # 9

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

Question # 10

Which one of the following is the unit of electric field intensity

Question # 11

The dot product of electric field intensity E and vector area A is called

Question # 12

Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be

Question # 13

The electric flux from a closed surface

Question # 14

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

Question # 15

The electrode connected with the positive terminal of the current source is called

Question # 16

A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance

Question # 17

The earth's potential is taken as

Question # 18

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

Question # 19

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 # 20

The force of repulsion between two point charges is F, when these are at a distance 0.1 m apart. Now the point charges are replaced by sphere of radii 5 cm each having the same charge as that of the respective point charges. The distance between their centre is again kept 0.1 m ; then the force of repulsion will

Question # 21

The electric field due to an infinite long thin wire at a distance R varies as

Question # 22

Electron volt is the unit of.

Question # 23

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

Question # 24

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 # 25

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 # 26

If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us

Question # 27

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

Question # 28

The SI unit of electric field intensity is

Question # 29

The charge carriers in electrolyte are positive and negative

Question # 30

The resistance of the given conductor can be increased by

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Force acting upon a charged particle kept between the plates of a charged condenser if F. IF one of the plates of the condenser is removed, force acting on the same will become
A. Zero
B. F/2
C. F
D. 2F
2 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
3 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
4 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
5 Electron volt is the unit of
A. Potential difference
B. Energy
C. Resistance
D. Capacitance
6 Ohm established a relation between
A. voltage and resistance
B. voltage and charge
C. voltage and current
D. voltage resistance and charge
7 The colour sequence in a carbon resistor in red, brown, orange and silver. The resistance of the resistor is
A. 21 x 103+ 10%
B. 23 x 101+ 10%
C. 21 x 103+ 5%
D. 12 x 103+ 5%
8 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
9 Potentiometer is more sensitive than voltmeter, because
A. Voltmeter has a very high resistance
B. Voltmeter has a very low resistance
C. Potentiometer does not draw any current from a source of unknown potential difference
D. Potentiometer is sensitive
10 Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity will be
A. 711μF
B. 611μF
C. 811μF
D. 511μF

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