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

The nature of capacity of electrostatic capacitor depends on

Question # 2

Current provided by a battery is maximum when

Question # 3

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

Question # 4

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 # 5

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

Question # 6

If a 40 watt light bulb burns for 2 hours. how much heat is generated

Question # 7

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

Question # 8

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

Question # 9

The energy stored in a charge capacitor

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 resistance of a conductor does not depend on its

Question # 12

The conductivity of a superconductor is

Question # 13

The unit of conductance is

Question # 14

The resistance of an incandescent lamp is

Question # 15

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

Question # 16

The ohm's is defined as

Question # 17

In a building, there are 15 bulbs of 40 watts, 5 bulbs of 100 watts, 5 fans of 80 watts and a heater of 1 kilowatt. The voltage of the electric main is 220 volts. The minimum efficiency of the main fuse of the building will be

Question # 18

Electron volt is the unit of

Question # 19

Ohm established a relation between

Question # 20

Battery is charged in motor cars, which is based on

Question # 21

Surface density of charge is defined as

Question # 22

What is the current is a 2 x 106ohm resistor having a potential difference of 2 x 103volts?

Question # 23

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

Question # 24

The speed of randomly moving electrons depends upon

Question # 25

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 # 26

Calculate the amount of charge flowing in 2 minutes in a wire of resistance 10Ωwhen a potential difference of 20 V is applied between its ends

Question # 27

Magnetic effect at a point caused due to flow a current depend upon the

Question # 28

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

Question # 29

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10-15 is

Question # 30

The minimum charge on any object can not be less than

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Magnetic effect at a point caused due to flow a current depend upon the
A. Quantity of current
B. Distance from current
C. Both the quantity of current and distance from current element
D. None of the all
2 The earth's potential is taken as
A. Negative
B. Positive
C. Zero
D. Infinite
3 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
A. 2 R
B. R
C. R/2
D. R/4
4 In a charged capacitor the energy is stored in
A. Both in positive and negative charges
B. Positive charges
C. The edges of the capacitor plates
D. The electric field between the plates
5 The SI unit of conductivity is
A. ohm-m
B. ohm-1m-1
C. ohm-m-1
D. ohm-1m
6 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
7 Capacitance of two or more capacitors
A. Increases in series combination
B. Increases in parallel combination
C. Remains unchanged
D. None of the above
8 A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?
A. 200 W
B. 302.5
C. 250 W
D. 350 W
9 Coulomb force, when any material medium is placed between two charges
A. Increases
B. Decreases
C. Remain unchanged
D. None of these
10 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?
A. Zero
B. 5μC m-2
C. 20μC m-2
D. 8μC m-2

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