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 earth's potential is taken as

Question # 2

Current provided by a battery is maximum when

Question # 3

The electric lines of force are

Question # 4

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 # 5

Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity will be

Question # 6

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

Question # 7

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 # 8

The substances whose resistance decreases with the increase in temperature these substances have coefficient of

Question # 9

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 # 10

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

Question # 11

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

Question # 12

Magnetic effect at a point caused due to flow a current depend upon the

Question # 13

The speed of randomly moving electrons depends upon

Question # 14

A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is

Question # 15

The SI unit of capacitance is

Question # 16

A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is

Question # 17

The current through a metallic conductor is due to the motion of

Question # 18

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

Question # 19

The resistance of a conductor does not depend on its

Question # 20

The charge carriers in gases are

Question # 21

The unit of intensity of electric field is

Question # 22

The minimum charge on any object can not be less than

Question # 23

In a voltmeter the conduction takes place due to

Question # 24

The electric flux from a closed surface

Question # 25

The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as

Question # 26

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

Question # 27

The powers of tow electric bulbs are 100 W and 200 W. Both of them are joined with 220 V mains. The ratio of resistances of their filaments will be

Question # 28

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

Question # 29

Coulomb's force between two point charges depends upon

Question # 30

A condenser of capacity 50μF is charged to 10 V.The energy stored is

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Resistance of a conductor depends upon
A. the quantity of current passing through it
B. the voltage applied between its end
C. its dimensions, physical state and nature of its material
D. all of the above
2 The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is
A. Q=V/C
B. Q=C/V
C. Q=1/2CV
D. Q=CV
3 The value of electrical constant of proportionality k is
A. 9 x 109Nm2C-2
B. 9 x 10-9Nm2C-2
C. 9 x 1010Nm2C2
D. 9.85 x 10-12N-1C-2
4 The unit of resistance is
A. volt
B. ampere
C. ohm
D. coat
5 The energy stored in a charge capacitor
A. 1/2CV2
B. 1/2C2V
C. 1/2C/V2
D. None of these
6 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
7 Electron volt is the unit of
A. Potential difference
B. Energy
C. Resistance
D. Capacitance
8 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
9 A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?
A. Electric potential at the surface of the cube is zero
B. Electric potential within the cube is zero
C. Electric filed is normal to the surface of the cube
D. Electric filed varies within the cube
10 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%

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