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

A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of 1 KV, its kinetic energy will be

Question # 2

One coulomb per second is equal to

Question # 3

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 # 4

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

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

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

Question # 9

The ohm's is defined as

Question # 10

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 # 11

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

Question # 12

At any point on the right bisector of the line joining two equal and opposite charges

Question # 13

The electric field intensity at a point due to a point charge

Question # 14

A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, then

Question # 15

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 # 16

The electric field due to an infinite long thin wire at a distance R varies as

Question # 17

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

Question # 18

Two point charge +3μC and +8μC repel each other with a force of 40 N. If a charge of -5μC is added to each of them, then the force between then will become

Question # 19

Heating effect caused by an electric circuit is written

Question # 20

The unit of resistance is

Question # 21

Equal charges are given to two spheres of different radii. The potential will

Question # 22

Resistance of a conductor depends upon

Question # 23

The earth's potential is taken as

Question # 24

The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is

Question # 25

Electron volt is the unit of.

Question # 26

The value of electrical constant of proportionality k is

Question # 27

A piece of fuse wire melts when a current of 15 ampere flows through it. With this current. If it dissipates 22.5 W, the resistance of fuse wire will be

Question # 28

Free electrons are

Question # 29

The SI unit of conductivity is

Question # 30

Solar cell converts sunlight directly into

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
A. Two
B. 1/2
C. Zero
D. 3/2
2 Coulomb force, when any material medium is placed between two charges
A. Increases
B. Decreases
C. Remain unchanged
D. None of these
3 The unit of resistivity is
A. ohm
B. ohm-m2
C. ohm-meter
D. ohm-m-1
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 concept of field theory was put forward by
A. Franklin
B. Kepler
C. Oersted
D. Michael Faraday
6 The SI unit of electric field intensity is
A. CN-1
B. NC-1or Vm-1
C. JC-1
D. AV-1
7 Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity will be
A. 711μF
B. 611μF
C. 811μF
D. 511μF
8 The minimum charge on any object can not be less than
A. 1.6 x 10-19C
B. 3.2 x 10-19C
C. 1.0 C
D. 4.8 x 10-19C
9 Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is
A. 11.0 ohm
B. 1.0 ohm
C. 7.0 ohm
D. 3.0 ohm
10 If 2.2 kilowatt power is transmitted through a 10 ohm line at 22000 volt, the power loss in the form of heat will be
A. 0.1 watt
B. 1 watt
C. 10 watt
D. 100 watt

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