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

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

Question # 2

For two resistance wires joined in parallel, the resultant resistance is 6/5 ohm. When one of the resistance wire breaks, the effective resistance becomes 2 ohm. The resistance of the broken wire is

Question # 3

The potential difference across each resistance in series combination is

Question # 4

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

Question # 5

The electric field will be uniform

Question # 6

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

Question # 7

One joule is equal to

Question # 8

The SI unit of current is

Question # 9

The capacitance of a parallel plate capacitor depends upon

Question # 10

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

Question # 11

The electric flux from a closed surface

Question # 12

In bringing an electron towards another electron, electrostatic potential energy of system

Question # 13

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

Question # 14

Cause of heat production in a current carrying conductor is

Question # 15

The SI unit of electric field intensity is

Question # 16

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

Question # 17

The fractional change in resistance per kelvin is known as

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

Ohm is the unit of

Question # 20

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

Question # 21

A wire is bent into a ring of radius R is given a charge q. The magnitude of the electrical field at the centre of the ring is

Question # 22

Force acting upon a charged particle kept between the plates of a charged condenser if F. IF one of the plates of the condenser is removed, force acting on the same will become

Question # 23

In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes

Question # 24

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 # 25

The ratio of the gravitational force Fgto the electrostatic force Febetween two electrons at the same distance apart is approximately

Question # 26

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

Question # 27

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

Question # 28

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

Question # 29

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

Question # 30

If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is
A. 8 J
B. 16 J
C. 4 x 10-3J
D. 2 x 10-3J
2 Solar cell converts sunlight directly into
A. potential energy
B. thermal energy
C. mechanical energy
D. electrical energy
3
Question Image
A. 5μF
B. 10μF
C. 3μF
D. 6μF
4 Force acting upon a charged particle kept between the plates of a charged condenser if F. IF one of the plates of the condenser is removed, force acting on the same will become
A. Zero
B. F/2
C. F
D. 2F
5 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
6 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
7 One coulomb per second is equal to
A. One volt
B. One ampere
C. One hom
D. One henry
8 The electric flux from a closed surface
A. Is independent of the shape of the surface
B. Depends on the charge enclosed by the surface
C. Both a and b
D. None of the above
9 When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates
A. Decreases
B. Increases
C. No change
D. May increase or decresase
10 A 60 W bulb operates on 220 V supply. The current flowing through the bulb is
A. 11/3 A
B. 3 A
C. 3/11 A
D. 6

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