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

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

Question # 2

The electric intensity outside the two oppositely charged parallel metal plates is

Question # 3

The colour sequence in a carbon resistor in red, brown, orange and silver. The resistance of the resistor is

Question # 4

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

Question # 5

The SI unit of electric field intensity is

Question # 6

Surface density of charge is defined as

Question # 7

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

Question # 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

Question # 9

The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10-19N, is

Question # 10

If the distance of separation between two chares is increased, the electrical potential energy of the system will

Question # 11

One electron volt is equal to

Question # 12

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 # 13

A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, then

Question # 14

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 # 15

Resistance of a conductor depends upon

Question # 16

The SI unit of capacitance is

Question # 17

The unit of resistance is

Question # 18

The resistance of a conductor does not depend on its

Question # 19

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

Question # 20

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

Question # 21

Ohm's law states that

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

The graphical representation of ohm's law is

Question # 24

When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to

Question # 25

The electric lines of force are

Question # 26

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

Question # 27

One coulomb per second is equal to

Question # 28

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

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 One electron volt is equal to
A. 1.6 x 1019eV
B. 6.25 x 1018 eV
C. 1.6 x 1018 eV
D. 6.25 x 1019eV
2 The electric field due to an infinite long thin wire at a distance R varies as
A. 1/R
B. 1/R2
C. R
D. R2
3 Potentiometer is more sensitive than voltmeter, because
A. Voltmeter has a very high resistance
B. Voltmeter has a very low resistance
C. Potentiometer does not draw any current from a source of unknown potential difference
D. Potentiometer is sensitive
4 The unit of resistivity is
A. ohm
B. ohm-m2
C. ohm-meter
D. ohm-m-1
5 If the distance of separation between two chares is increased, the electrical potential energy of the system will
A. Increase
B. Decrease
C. May increase or decrease
D. Remain the same
6 A condenser of capacity 50μF is charged to 10 V.The energy stored is
A. 1.25 x 10-3J
B. 3.75 x 10-3J
C. 2.5 x 10-3J
D. 5 x 10-3J
7 The minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is
A. 4/5Ω
B. 5/4Ω
C. 20Ω
D. 0.05 Ω
8 One coulomb per second is equal to
A. One volt
B. One ampere
C. One hom
D. One henry
9 The fractional change in resistance per kelvin is known as
A. temperature coefficient
B. resistance coefficient
C. super temperature
D. critical temperature
10 The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10-19N, is
A. 25
B. 225
C. 625
D. 1250

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