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

In a Milikian's oil drop experiment the charge on an oil drop is calculated to be 6.35 x 10-19C. The number of excess electrons on the drop is

Question # 2

Which of the following represents an electric current?

Question # 3

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 # 4

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

Question # 5

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 # 6

The nature of capacity of electrostatic capacitor depends on

Question # 7

Specific resistance of a wire depends upon

Question # 8

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

Question # 9

The value of electrical constant of proportionality k is

Question # 10

A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. The quantity that remains unchanged is

Question # 11

A wire is bent into a ring of radius R is given a charge q. The magnitude of the electrical field at the centre of the ring is

Question # 12

A closed surface contains two equal and opposite charges. The net electric flux from the surface will be

Question # 13

The concept of field theory was put forward by

Question # 14

The graphical representation of ohm's law is

Question # 15

One joule is equal to

Question # 16

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

Question # 17

Cause of heat production in a current carrying conductor is

Question # 18

The unit of resistivity is

Question # 19

The electric field will be uniform

Question # 20

The capacitance of a parallel plate capacitor depends upon

Question # 21

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

Question # 22

Ohm's law states that

Question # 23

The charge carriers in electrolyte are positive and negative

Question # 24

The ohm's is defined as

Question # 25

In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called

Question # 26

In bringing an electron towards another electron, electrostatic potential energy of system

Question # 27

For two resistance wires joined in parallel, the resultant resistance is 6/5 ohm. When one of the resistance wire breaks, the effective resistance becomes 2 ohm. The resistance of the broken wire is

Question # 28

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 # 29

Capacitance of two or more capacitors

Question # 30

The SI unit of current is

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The SI unit of current is
A. watt
B. coulomb
C. volt
D. ampere
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 Solar cell converts sunlight directly into
A. potential energy
B. thermal energy
C. mechanical energy
D. electrical energy
4 Three resistors of resistance R each are combined in various ways. Which of the following cannot be obtained?
A. 3RΩ
B. 2R/4Ω
C. R/3Ω
D. 2R/3Ω
5 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
6 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
7 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
A. They have the same potential
B. They have the same amount of charge
C. They have the same capacity
D. They have the same shape
8 Ohm is the unit of
A. current
B. capacitance
C. energy
D. resistance
9 The ratio of the gravitational force Fgto the electrostatic force Febetween two electrons at the same distance apart is approximately
A. 9.8
B. 24 x 1019
C. 24 x 1042
D. 24 x 10-44
10 Which of the following does not obey ohm's law?
A. Copper
B. Al
C. Diode
D. None

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