ECAT Pre Engineering Physics Chapter 12 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 12 Electrostatics

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 12 Electrostatics

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Physics ECAT Pre Engineering Chapter 12 Electrostatics

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Question # 1

The SI unit of capacitance is

Question # 2

The concept of field theory was put forward by

Question # 3

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

Question # 4

Ohm established a relation between

Question # 5

One joule is equal to

Question # 6

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

Question # 7

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

Question # 8

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

Question # 9

An electric charge at rest is

Question # 10

The SI unit of electric flux is

Question # 11

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

Question # 12

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 # 13

The charge per unit time through any cross-section of a conductor is called

Question # 14

If the distance between the plates of a parallel plate condenser of capacity 10μF is doubled then new capacity will be

Question # 15

The resistance of an incandescent lamp is

Question # 16

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 # 17

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

Question # 18

The unit of resistance is

Question # 19

The minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is

Question # 20

The fractional change in resistance per kelvin is known as

Question # 21

Resistor is a device which convert electric energy to

Question # 22

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 # 23

A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?

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

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 # 26

The substances whose resistance decreases with the increase in temperature these substances have coefficient of

Question # 27

Coulomb's force between two point charges depends upon

Question # 28

The SI unit of current is

Question # 29

Specific resistance of a wire depends upon

Question # 30

The dot product of electric field intensity E and vector area A is called

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
2 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
A. power
B. current
C. resistance
D. temperature
3 Current provided by a battery is maximum when
A. Internal resistance equal to external resistance
B. Internal resistance is greater than external resistance
C. Internal resistance is less then external resistance
D. None of these
4 The relation between charge 'Q' and current 'I' is given by
A. Q = I/t
B. Q = It
C. Q = I2t
D. Q = I2/t
5 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
6 The conductivity of a superconductor is
A. Infinite
B. Very large
C. Very small
D. Zero
7 106electrons are moving through a wire per second, the current developed is
A. 1.6 x 10-19
B. 1 A
C. 1.6 x 10-15 A
D. 106A
8 The electric lines of force are
A. Imaginary
B. Physically existing everywhere
C. Physically existing near the charge
D. All of the above
9 The speed of randomly moving electrons depends upon
A. pressure
B. volume
C. temperature
D. mass
10 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
A. 7.20 N
B. 11.25 N
C. 22.50 N
D. 45.00

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