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

The charge carriers in gases are

Question # 2

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 # 3

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

Question # 4

If a 40 watt light bulb burns for 2 hours. how much heat is generated

Question # 5

The electric field intensity at a point due to a point charge

Question # 6

The value of electrical constant of proportionality k is

Question # 7

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 # 8

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

Question # 9

The resistance of the given conductor can be increased by

Question # 10

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

Question # 11

If electric and gravitational force on an electron in a uniform electric field will be

Question # 12

Capacitance of two or more capacitors

Question # 13

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

Question # 14

In a charged capacitor the energy is stored in

Question # 15

The unit of intensity of electric field is

Question # 16

Which one of the following causes production of heat when current is set up in a wire?

Question # 17

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

Question # 18

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 # 19

One coulomb per second is equal to

Question # 20

The force between two chares 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become

Question # 21

If two bulbs one of 60 W and other of 100 W are connected in parallel, then which one of the following will flow more?

Question # 22

If the distance between the plates of a parallel plate condenser of capacity 10μF is doubled then new capacity will be

Question # 23

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

Question # 24

The potential difference across each resistance in series combination is

Question # 25

The resistance of a conductor does not depend on its

Question # 26

A 60 W bulb operates on 220 V supply. The current flowing through the bulb is

Question # 27

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

Question # 28

The electric field due to an infinite long thin wire at a distance R varies as

Question # 29

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10-15 is

Question # 30

The dot product of electric field intensity E and vector area A is called

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of 1 KV, its kinetic energy will be
A. 1840 KeV
B. 1/1840 KeV
C. 1 KeV
D. 920 KeV
2 The electric field will be uniform
A. Near a positive point charge
B. Near a negative point charge
C. Between two oppositely charged parallel metal plates
D. None of above
3 Electron volt is the unit of
A. Potential difference
B. Energy
C. Resistance
D. Capacitance
4 A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes
A. 2R
B. 4R
C. 16R
D. Zero
5 The charge carriers in electrolyte are positive and negative
A. protons
B. electrons
C. ions
D. none of these
6 Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity will be
A. 711μF
B. 611μF
C. 811μF
D. 511μF
7 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%
8 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
A. 2 R
B. R
C. R/2
D. R/4
9 Battery is charged in motor cars, which is based on
A. Chemical effect
B. Magnetic effect
C. Electric effect
D. None
10 When three identical bulbs of 60 watt, 200 volt rating are connected in series to a 200 volt supply, the power drawn by them will be
A. 180 watt
B. 10 watt
C. 20 watt
D. 60 watt

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