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

Question # 2

Resistor is a device which convert electric energy to

Question # 3

An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be

Question # 4

The charge carriers in electrolyte are positive and negative

Question # 5

One moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is

Question # 6

Potentiometer is more sensitive than voltmeter, because

Question # 7

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

Question # 8

Which one of the following is the unit of electric field intensity

Question # 9

The force between two chares 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become

Question # 10

Thermocouple is an arrangement of two different metals

Question # 11

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

Question # 12

A conducting wire is drawn to double its length. Final resistivity of the material will be

Question # 13

Electric flux is defined by the relation

Question # 14

The nature of capacity of electrostatic capacitor depends on

Question # 15

The concept of field theory was put forward by

Question # 16

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

Question # 17

The relation V = IR represents

Question # 18

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

Question # 19

If 2.2 kilowatt power is transmitted through 1 10 ohm line at 22000 volt, the power loss in the form of heat will be

Question # 20

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

Question # 21

One joule is equal to

Question # 22

The colour sequence in a carbon resistor in red, brown, orange and silver. The resistance of the resistor is

Question # 23

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

Question # 24

Coulomb's force between two point charges depends upon

Question # 25

The SI unit of permitivity is

Question # 26

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 # 27

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

Question # 28

If we increase the distance between two plates of the capacitor, the capacitance will

Question # 29

The unit of conductance is

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy
A. 200 J
B. 100 J
C. 1000 J
D. 400 J
2 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
3 The substances whose resistance decreases with the increase in temperature these substances have coefficient of
A. positive temperature
B. negative temperature
C. absolute temperature
D. zero temperature
4 The electric field due to an infinite long thin wire at a distance R varies as
A. 1/R
B. 1/R2
C. R
D. R2
5 The SI unit of current is
A. watt
B. coulomb
C. volt
D. ampere
6 The electric field will be uniform
A. Near a positive point charge
B. Near a negative point charge
C. Between two oppositely charged parallel metal plates
D. None of above
7 Consider a spherical shell of metal at he centre of which a positive point charge is kept
A. The electric filed is zero outside the shell
B. The electric field is zero everywhere
C. The electric field is zero in the region inside the shell
D. The electric field is non-zero in both regions outside and inside the shell
8 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
9 A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance
A. Increase k time
B. Decreases k times
C. Decreases 1/K times
D. Remains unchanged
10 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

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