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

A point charge A of charge +4μC and another B of charge -1μC are placed in air at a distance 1 m apart. Then the distance of the point on the line joining the charge B, where the resultant electric field is zero, is (in m)

Question # 2

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 # 3

A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance

Question # 4

The graphical representation of ohm's law is

Question # 5

The charge carriers in gases are

Question # 6

In a charged capacitor the energy is stored in

Question # 7

The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is

Question # 8

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

Question # 9

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

Question # 10

The SI unit of current is

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

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 # 15

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 # 16

The capacity of a parallel plat capacitor depends on the

Question # 17

Electric potential of earth is taken to be zero because the earth is good

Question # 18

The resistivity of a substance depends upon the

Question # 19

The unit of resistivity is

Question # 20

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 # 21

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

Question # 22

The speed of randomly moving electrons depends upon

Question # 23

The SI unit of permitivity is

Question # 24

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

Question # 25

The thermistors are usually made of

Question # 26

Coulomb's force between two point charges depends upon

Question # 27

The unit of resistance is

Question # 28

Electric flux is defined by the relation

Question # 29

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 # 30

Ohm established a relation between

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 The conventional current in a circuit is defined as " current which passes from a point at higher potential to a point at lower potential as if it represent a movement of
A. negative charges
B. positive charges
C. protons
D. electrons
4 The capacity of a parallel plat capacitor depends on the
A. Type to metal used
B. Thickness of plates
C. Potential applied across the plates
D. Separation between the plates
5 The thermistors are usually made of
A. Metals with low temperature coefficient of resistivity
B. Metals with high temperature coefficient of resistivity
C. Metal oxides with high temperature coefficient of resistivity
D. Semi conducting materials having low temperature coefficient of resistivity
6 Resistance of a conductor depends upon
A. the quantity of current passing through it
B. the voltage applied between its end
C. its dimensions, physical state and nature of its material
D. all of the above
7 Some charge is being given to a conductor. Then its potential
A. Is maximum at surface
B. Is maximum at centre
C. Is remain same throughout the conductor
D. Is maximum somewhere between surface and centre
8 The ohm's is defined as
A. 1 ampere / 1 volts
B. 1 coulomb / 1 volt
C. 1 volt / 1 ampere
D. 1 volt / 1 coulomb
9 Coulomb force, when any material medium is placed between two charges
A. Increases
B. Decreases
C. Remain unchanged
D. None of these
10 When three identical bulbs of 60 watt, 200 volt rating are connected in series to a 200 volt supply, the power drawn by them will be
A. 180 watt
B. 10 watt
C. 20 watt
D. 60 watt

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