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

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

Question # 2

The electrode connected with the positive terminal of the current source is called

Question # 3

Electric generators which convert mechanical energy into

Question # 4

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

Question # 5

In a charged capacitor the energy is stored in

Question # 6

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 # 7

Electric flux is defined by the relation

Question # 8

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 # 9

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

Question # 10

The thermistors are usually made of

Question # 11

The energy stored in a charge capacitor

Question # 12

The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is

Question # 13

Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity will be

Question # 14

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

Question # 15

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

Question # 16

The unit of intensity of electric field is

Question # 17

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

Question # 18

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

Question # 19

Thermocouple is an arrangement of two different metals

Question # 20

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

Question # 21

If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be

Question # 22

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

Question # 23

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 # 24

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

Question # 25

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

Question # 26

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

Question # 27

Coulomb force, when any material medium is placed between two charges

Question # 28

The charge carriers in gases are

Question # 29

A 100 W, 200 V bulb is connected to a 160 volts supply. The actual power consumption would be

Question # 30

The SI unit of electric flux is

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Coulomb's force between two point charges depends upon
A. Magnitude of charges
B. Distance between them
C. Medium in which they are located
D. All of the above
2 Physicist George Simon ohm was a
A. German physical
B. French physicist
C. Chinese physicist
D. Russian physicist
3 The relation V = IR represents
A. Ampere law
B. Faraday's law
C. Ohm's law
D. Len's law
4 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
5 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
6 Ohm established a relation between
A. voltage and resistance
B. voltage and charge
C. voltage and current
D. voltage resistance and charge
7 Electric potential of earth is taken to be zero because the earth is good
A. Semiconductor
B. Conductor
C. Insulator
D. Dielectric
8 The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is
A. 10Ω
B. 20Ω
C. 30Ω
D. 40Ω
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
A. 1 : 2
B. 2 : 1
C. 1 : 4
D. 4 : 1
10 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

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