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

The charge carriers in electrolyte are positive and negative

Question # 2

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

Question # 3

Resistance of a conductor is increased, the currant will

Question # 4

The liquid which conduct current is known as

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

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

Question # 9

At ordinary temperature, an increase in temperature increases the conductivity of

Question # 10

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

Question # 11

The electric field intensity at a point due to a point charge

Question # 12

The resistance of the given conductor can be increased by

Question # 13

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

Question # 14

The electric flux from a closed surface

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

The resistance of a conductor does not depend on its

Question # 17

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 # 18

Coulomb's force between two point charges depends upon

Question # 19

A car battery has e.m.f 12 volt and internal resistance 5 x 10-2ohm. If it draws 60 ampere current, the terminal voltage of the battery will be

Question # 20

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 # 21

Free electrons are

Question # 22

One coulomb per second is equal to

Question # 23

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

Question # 24

A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor

Question # 25

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 # 26

The SI unit of permitivity is

Question # 27

An electric charge at rest is

Question # 28

The energy stored in a charge capacitor

Question # 29

Battery is charged in motor cars, which is based on

Question # 30

Coulomb force, when any material medium is placed between two charges

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to
A. One joule
B. One erg
C. One electron volt
D. None of these
2 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
3 A closed surface contains two equal and opposite charges. The net electric flux from the surface will be
A. Negative
B. Positive
C. Infinite
D. Zero
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 If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us
A. parabola
B. straight line
C. hyper bola
D. ellipse
6 Which one of the following has larger value of relative permitivity Erat room temperature?
A. Vaccum
B. Air
C. Glass
D. Water
7 A conducting wire is drawn to double its length. Final resistivity of the material will be
A. Double of the original one
B. Half of the original one
C. One fourth of the original one
D. Same as original one
8 One coulomb per second is equal to
A. One volt
B. One ampere
C. One hom
D. One henry
9 An electric dipole is at the centre of a hollow sphere of radius r. The total normal electric flux through the sphere is (here Q is the charge and d is the distance between the two charges of the dipole)
A. Q/4πr2
B. 2Q/4πr2
C. Q.d
D. Zero
10 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
A. q = Q/4
B. q = Q/2
C. q = !
D. None of these

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