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 minimum charge on any object can not be less than

Question # 2

The force of repulsion between two point charges is F, when these are at a distance 0.1 m apart. Now the point charges are replaced by sphere of radii 5 cm each having the same charge as that of the respective point charges. The distance between their centre is again kept 0.1 m ; then the force of repulsion will

Question # 3

The unit of resistivity is

Question # 4

The SI unit of electric field intensity is

Question # 5

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

Question # 6

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 # 7

The SI unit of electric flux is

Question # 8

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

Question # 9

The charge per unit time through any cross-section of a conductor is called

Question # 10

In a charged capacitor the energy is stored in

Question # 11

Consider a spherical shell of metal at he centre of which a positive point charge is kept

Question # 12

The value of electrical constant of proportionality k is

Question # 13

A charge Q is divided into two parts q and Q - q and separated by a distance R. The force of repulsion between them will be maximum when

Question # 14

Three resistors of resistance R each are combined in various ways. Which of the following cannot be obtained?

Question # 15

If an electron of charge 'e' is accelerated through a potential difference V., it will acquire energy

Question # 16

Resistance of a conductor depends upon

Question # 17

The resistance of the given conductor can be increased by

Question # 18

One coulomb of charge is created by

Question # 19

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 # 20

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 # 21

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

Question # 22

An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be

Question # 23

A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?

Question # 24

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

Question # 25

The ratio of the gravitational force Fgto the electrostatic force Febetween two electrons at the same distance apart is approximately

Question # 26

The capacitance of a parallel plate capacitor depends upon

Question # 27

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 # 28

The SI unit of permitivity is

Question # 29

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 # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 The electrode connected with the positive terminal of the current source is called
A. cathode
B. anode
C. electrolyte
D. position
4 The charge per unit time through any cross-section of a conductor is called
A. capacitance
B. electric power
C. current
D. potential difference
5 At any point on the right bisector of the line joining two equal and opposite charges
A. At electric field is zero
B. The electric potential is zero
C. The electric potential decreases with increasing distance from the centre
D. The electric field is perpendicular to the line joining the charges
6 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
A. Zero
B. 10Ω
C. 1Ω
D. 0.10Ω
7 An alpha particle is accelerated through a potential difference of 106volt. Its kinetic energy will be
A. 1 MeV
B. 2 MeV
C. 4 MeV
D. 8 MeV
8 A closed surface contains two equal and opposite charges. The net electric flux from the surface will be
A. Negative
B. Positive
C. Infinite
D. Zero
9 A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor
A. Increases
B. Decreases
C. Remain unchanged
D. Becomes infinite
10 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

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