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

If the two charges in Coulomb's law have double distance between them, then electric force

Question # 2

The SI unit of electric flux is

Question # 3

A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

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

Question # 9

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 # 10

Ohm's law states that

Question # 11

The SI unit of electric field intensity is

Question # 12

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

Question # 13

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

Question # 14

The ohm's is defined as

Question # 15

A uniform resistance wire of Length L and diameter d has a resistance R. Another wire of same material has length, 4L and diameter 2d, the resistance will be

Question # 16

The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10-19N, is

Question # 17

In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called

Question # 18

An electric charge at rest is

Question # 19

The unit of intensity of electric field is

Question # 20

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

Question # 21

Consider a spherical shell of metal at he centre of which a positive point charge is kept

Question # 22

An alpha particle is accelerated through a potential difference of 106volt. Its kinetic energy will be

Question # 23

Capacitance of two or more capacitors

Question # 24

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

Question # 25

A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. The quantity that remains unchanged is

Question # 26

Cause of heat production in a current carrying conductor is

Question # 27

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 # 28

The minimum charge on any object can not be less than

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Resistance of a conductor is increased, the currant will
A. Decrease
B. Increase
C. Remain the same
D. None of these
2 Solar cell converts sunlight directly into
A. potential energy
B. thermal energy
C. mechanical energy
D. electrical energy
3 Resistor is a device which convert electric energy to
A. Heat energy
B. Chemical energy
C. Elastic energy
D. All of the above
4 Electron volt is the unit of
A. Potential difference
B. Energy
C. Resistance
D. Capacitance
5 Free electrons are
A. tightly bound
B. fixed
C. loosely bound
D. tightly fixed
6 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
7 A 100 W, 200 V bulb is connected to a 160 volts supply. The actual power consumption would be
A. 64 W
B. 80 W
C. 100 W
D. 125 W
8 The unit of conductance is
A. ohm
B. meter
C. mho
D. ohm-meter
9 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)
A. 2
B. 1
C. 0.5
D. 1.5
10 The resistance of the given conductor can be increased by
A. Increasing the area
B. Changing resistivity
C. Decreasing the length
D. None of the above because change does not matter because in any case the volume remains the same

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