ECAT Pre General Science Physics Chapter 12 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 12 Electrostatics

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

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ECAT Pre General Science Physics Chapter 12 Electrostatics

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Question # 1

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 # 2

In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes

Question # 3

The graphical representation of ohm's law is

Question # 4

At any point on the right bisector of the line joining two equal and opposite charges

Question # 5

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 # 6

The fractional change in resistance per kelvin is known as

Question # 7

The nature of capacity of electrostatic capacitor depends on

Question # 8

The energy stored in a charge capacitor

Question # 9

The unit of resistivity is

Question # 10

The electric flux from a closed surface

Question # 11

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

Question # 12

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 # 13

The resistance of the given conductor can be increased by

Question # 14

In a voltmeter the conduction takes place due to

Question # 15

Physicist George Simon ohm was a

Question # 16

In a charged capacitor the energy is stored in

Question # 17

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)

Question # 18

The electric lines of force are

Question # 19

Electric generators which convert mechanical energy into

Question # 20

The capacity of a parallel plat capacitor depends on the

Question # 21

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

Question # 22

The colour sequence in a carbon resistor in red, brown, orange and silver. The resistance of the resistor is

Question # 23

If we increase the distance between two plates of the capacitor, the capacitance will

Question # 24

Surface density of charge is defined as

Question # 25

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

Question # 26

The charge carriers in electrolyte are positive and negative

Question # 27

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

Question # 28

The SI unit of capacitance is

Question # 29

Electron volt is the unit of.

Question # 30

The value of electrical constant of proportionality k is

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is
A. 8 J
B. 16 J
C. 4 x 10-3J
D. 2 x 10-3J
2 Electron volt is the unit of.
A. Potential difference
B. Energy
C. Resistance
D. Capacitance
3 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
4 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
5 In a building, there are 15 bulbs of 40 watts, 5 bulbs of 100 watts, 5 fans of 80 watts and a heater of 1 kilowatt. The voltage of the electric main is 220 volts. The minimum efficiency of the main fuse of the building will be
A. 0.4 A
B. 11.4 A
C. 9.8 A
D. 10.6 A
6 Surface density of charge is defined as
A. Charge per unit volume
B. Charge per unit length
C. Charge per unit area
D. Charge per unit mass
7 One coulomb of charge is created by
A. 10 electrons
B. 1.6 x 10-19electrons
C. 6.25 x 1018electrons
D. 6.25 x 1021electrons
8 The ohm's is defined as
A. 1 ampere / 1 volts
B. 1 coulomb / 1 volt
C. 1 volt / 1 ampere
D. 1 volt / 1 coulomb
9 If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be
A. 6 ohm
B. 4 ohm
C. zero ohm
D. 1.33 ohm
10 A (100 W , 200 W) bulb is connected to a 160 V power supply. The power consumption would be
A. 64 W
B. 80 W
C. 100 W
D. 125 W

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