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

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 # 2

The concept of field theory was put forward by

Question # 3

A conducting wire is drawn to double its length. Final resistivity of the material will be

Question # 4

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

Question # 5

Capacitance of two or more capacitors

Question # 6

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

Question # 7

Surface density of charge is defined as

Question # 8

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

Question # 9

The electric flux is linked with a surface will be maximum when

Question # 10

One coulomb of charge is created by

Question # 11

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

Question # 12

What is the current is a 2 x 106ohm resistor having a potential difference of 2 x 103volts?

Question # 13

Two conductors having the same type of charges are connected by a conducting wire. There would not be any amount of charges on them if

Question # 14

The unit of resistivity is

Question # 15

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

Question # 16

The potential difference across the conductors should be maintained constant by connecting the ends of wire to the terminal of a device called a source of

Question # 17

The resistivity of a substance depends upon the

Question # 18

In a charged capacitor the energy is stored in

Question # 19

Which of the following does not obey ohm's law?

Question # 20

The unit of resistance is

Question # 21

Resistance of a conductor depends upon

Question # 22

Resistance of a conductor is increased, the currant will

Question # 23

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 # 24

The capacity of a parallel plat capacitor depends on the

Question # 25

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

Question # 26

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

Question # 27

A piece of fuse wire melts when a current of 15 ampere flows through it. With this current. If it dissipates 22.5 W, the resistance of fuse wire will be

Question # 28

The SI unit of electric field intensity is

Question # 29

The charge carriers in electrolyte are positive and negative

Question # 30

The potential difference across each resistance in series combination is

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
2 What is the current is a 2 x 106ohm resistor having a potential difference of 2 x 103volts?
A. 10-1A
B. 10-2A
C. 10-4A
D. 1 mA
3 The SI unit of permitivity is
A. Nm2C2
B. N-1m-2C2
C. NmC2
D. Nm2C-1
4 The thermistors are usually made of
A. Metals with low temperature coefficient of resistivity
B. Metals with high temperature coefficient of resistivity
C. Metal oxides with high temperature coefficient of resistivity
D. Semi conducting materials having low temperature coefficient of resistivity
5
Question Image
A. 5μF
B. 10μF
C. 3μF
D. 6μF
6 The unit of resistance is
A. volt
B. ampere
C. ohm
D. coat
7 Solar cell converts sunlight directly into
A. potential energy
B. thermal energy
C. mechanical energy
D. electrical energy
8 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
9 The electric flux from a closed surface
A. Is independent of the shape of the surface
B. Depends on the charge enclosed by the surface
C. Both a and b
D. None of the above
10 Specific resistance of a wire depends upon
A. Length
B. Cross-section area
C. Mass
D. None

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