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

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

Question # 2

The statement "the electric force of repulsion or attraction between two point charges is directly proportional to the product of the charges and inversely proportional to square of the distance between them" refer to

Question # 3

Ohm established a relation between

Question # 4

Coulomb's force between two point charges depends upon

Question # 5

The capacity of a parallel plat capacitor depends on the

Question # 6

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 # 7

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

Question # 8

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

Question # 9

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 # 10

If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is

Question # 11

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

Question # 12

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

Question # 13

Two electric bulbs of 200 W and 100 W have same voltage. If R1and R2be their resistance respectively then

Question # 14

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 # 15

Some charge is being given to a conductor. Then its potential

Question # 16

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 # 17

Cause of heat production in a current carrying conductor is

Question # 18

An electric dipole is at the centre of a hollow sphere of radius r. The total normal electric flux through the sphere is (here Q is the charge and d is the distance between the two charges of the dipole)

Question # 19

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 # 20

The SI unit of electric flux is

Question # 21

The electric lines of force are

Question # 22

In a charged capacitor the energy is stored in

Question # 23

One electron volt is equal to

Question # 24

The electric flux from a closed surface

Question # 25

A certain charge liberates 0.8 g of oxygen. The same charge will liberate. how many g of silver?

Question # 26

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 # 27

Electric flux is defined by the relation

Question # 28

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

Question # 29

A hollow insulated conduction sphere is given a positive charge of 10μC. What will be the electric field at the centre of the sphere if its radius is 2 meters?

Question # 30

The SI unit of electric field intensity is

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The electric intensity at infinite distance from the point charge will be
A. Infinite
B. Positive
C. Zero
D. Negative
2
Question Image
A. 5μF
B. 10μF
C. 3μF
D. 6μF
3 106electrons are moving through a wire per second, the current developed is
A. 1.6 x 10-19
B. 1 A
C. 1.6 x 10-15 A
D. 106A
4 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
5 Coulomb force, when any material medium is placed between two charges
A. Increases
B. Decreases
C. Remain unchanged
D. None of these
6 If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us
A. parabola
B. straight line
C. hyper bola
D. ellipse
7 The substances whose resistance decreases with the increase in temperature these substances have coefficient of
A. positive temperature
B. negative temperature
C. absolute temperature
D. zero temperature
8 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
9 The electric field intensity at a point due to a point charge
A. Falls off inversely as the distance
B. Falls off inversely as the square of distance
C. Remains unchanged with distance
D. Increase directly as square of distance
10 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

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