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

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

Question # 2

Ohm is the unit of

Question # 3

The concept of field theory was put forward by

Question # 4

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

Question # 5

For two resistance wires joined in parallel, the resultant resistance is 6/5 ohm. When one of the resistance wire breaks, the effective resistance becomes 2 ohm. The resistance of the broken wire is

Question # 6

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

Question # 7

Battery is charged in motor cars, which is based on

Question # 8

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

Question # 9

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

Question # 10

A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?

Question # 11

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 # 12

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

Question # 13

The unit of intensity of electric field is

Question # 14

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

Question # 15

Ohm established a relation between

Question # 16

The SI unit of electric flux is

Question # 17

The relation V = IR represents

Question # 18

The relation between charge 'Q' and current 'I' is given by

Question # 19

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

Question # 20

If the length of the conductor is double and its cross sectional area is halved, its conductance will

Question # 21

The minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is

Question # 22

The unit of conductance is

Question # 23

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

Question # 24

The energy stored in a charge capacitor

Question # 25

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

Question # 26

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 # 27

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

Question # 28

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

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
2 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
A. 1 : 2
B. 2 : 1
C. 1 : 4
D. 4 : 1
3 The charge carriers in gases are
A. electrons
B. ions
C. protons
D. ions and electrons
4 One joule is equal to
A. 1.6 x 1019eV
B. 6.25 x 1018eV
C. 1.6 x 1818eV
D. 6.25 x 1019eV
5 Electric flux is defined by the relation
A. E.A.
B. E x A
C. E/A
D. none of these
6 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
7 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
8 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
A. -q
B. +q
C. -2q
D. +4q
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 Solar cell converts sunlight directly into
A. potential energy
B. thermal energy
C. mechanical energy
D. electrical energy

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