ECAT Pre Computer Science Chapter 12 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 12 Electrostatics

Try The MCQ's Test For ECAT Physics Chapter 12 Electrostatics

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ECAT Physics 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

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

Question # 3

The relation between charge 'Q' and current 'I' is given by

Question # 4

An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be

Question # 5

The fractional change in resistance per kelvin is known as

Question # 6

A 10 F capacitor is charged to a potential difference of 50 V and is connected to another uncharged capacitor in parallel. Now the common potential difference becomes 20 volt.The capacitance of second capacitor is

Question # 7

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 # 8

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

Question # 9

The earth's potential is taken as

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

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

Question # 12

If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is

Question # 13

Cause of heat production in a current carrying conductor is

Question # 14

Free electrons are

Question # 15

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
A. 5 volt
B. 3 volt
C. 15 volt
D. 9 volt
2 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
A. 1/3 V
B. 2/3 V
C. 3/2 V
D. 3V
3 Current provided by a battery is maximum when
A. Internal resistance equal to external resistance
B. Internal resistance is greater than external resistance
C. Internal resistance is less then external resistance
D. None of these
4 If the length of the conductor is double and its cross sectional area is halved, its conductance will
A. Increase four fold
B. Become one-fourth
C. Become one-half
D. Remains unchanged
5 Specific resistance of a wire depends upon
A. Length
B. Cross-section area
C. Mass
D. None
6 The potential difference across each resistance in series combination is
A. same
B. different
C. zero
D. none of these
7 Electric potential of earth is taken to be zero because the earth is good
A. Semiconductor
B. Conductor
C. Insulator
D. Dielectric
8 A point charge Q is placed at the mid-point of a line joining two charges. 4q and q. if the net force on charge q is zero. then Q must be equal to
A. -q
B. +q
C. -2q
D. +4q
9 The SI unit of electric flux is
A. Weber
B. Nm2C-1
C. NmC-1
D. Nm-2C
10 If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is
A. one ohm
B. one joule
C. one volt
D. one ampere

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