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

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 # 2

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

Question # 3

In a charged capacitor the energy is stored in

Question # 4

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

Question # 5

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

Question # 6

The SI unit of capacitance is

Question # 7

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

Question # 8

A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is

Question # 9

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

Question # 10

At ordinary temperature, an increase in temperature increases the conductivity of

Question # 11

A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes

Question # 12

Two point charges A and B separated by a distance R attract each other with a force of 12 x 10-3N. The force between A and B when the charges on them are doubled and distance is halved

Question # 13

The current through a metallic conductor is due to the motion of

Question # 14

In a voltmeter the conduction takes place due to

Question # 15

The capacitance of a parallel plate capacitor depends upon

Question # 16

Specific resistance of a wire depends upon

Question # 17

A current of 1.6 A is passed through a solution of CuSO4. How many Cu2+ions are liberated in one minute?

Question # 18

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

Question # 19

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

Question # 20

A car battery has e.m.f 12 volt and internal resistance 5 x 10-2ohm. If it draws 60 ampere current, the terminal voltage of the battery will be

Question # 21

Heating effect caused by an electric circuit is written

Question # 22

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

Question # 23

Resistance of a conductor depends upon

Question # 24

The resistance of the given conductor can be increased by

Question # 25

The SI unit of conductivity is

Question # 26

When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates

Question # 27

The unit of resistance 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

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 # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Ohm established a relation between
A. voltage and resistance
B. voltage and charge
C. voltage and current
D. voltage resistance and charge
2 Ohm is the unit of
A. current
B. capacitance
C. energy
D. resistance
3 Equal charges are given to two spheres of different radii. The potential will
A. Be more on the smaller sphere
B. Be more on the bigger sphere
C. Be equal on both the sphere
D. Depend on the nature of the material of the sphere
4 Surface density of charge is defined as
A. Charge per unit volume
B. Charge per unit length
C. Charge per unit area
D. Charge per unit mass
5 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
6 In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes
A. Four-fold
B. One-half
C. One-fourth
D. Zero
7 The graphical representation of ohm's law is
A. hyperbola
B. straight line
C. ellipse
D. parabola
8 The SI unit of permitivity is
A. Nm2C2
B. N-1m-2C2
C. NmC2
D. Nm2C-1
9 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
10 If the two charges in Coulomb's law have double distance between them, then electric force
A. Becomes two-fold
B. Becomes four-fold
C. Remains the same
D. None of these

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