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

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

Question # 2

The electric intensity at infinite distance from the point charge will be

Question # 3

The capacitance of a parallel plate capacitor depends upon

Question # 4

Ohm established a relation between

Question # 5

A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor

Question # 6

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

Question # 7

A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy

Question # 8

Thermocouple is an arrangement of two different metals

Question # 9

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

Question # 10

If the distance of separation between two chares is increased, the electrical potential energy of the system will

Question # 11

The SI unit of permitivity is

Question # 12

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 # 13

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

Question # 14

If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be

Question # 15

In a Milikian's oil drop experiment the charge on an oil drop is calculated to be 6.35 x 10-19C. The number of excess electrons on the drop is

Question # 16

One coulomb of charge is created by

Question # 17

Which of the following represents an electric current?

Question # 18

Two point charges A and B separated by a distance R attract each other with a force of 12 x 10-3N. The force between A and B when the charges on them are doubled and distance is halved

Question # 19

Electric generators which convert mechanical energy into

Question # 20

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 # 21

Ohm's law states that

Question # 22

The resistivity of a substance depends upon the

Question # 23

The SI unit of conductivity is

Question # 24

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 # 25

Electric potential of earth is taken to be zero because the earth is good

Question # 26

Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is

Question # 27

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

Question # 28

The conductivity of a superconductor is

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J
A. 5
B. 0.5
C. 0.005
D. 50
2 A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor
A. Increases
B. Decreases
C. Remain unchanged
D. Becomes infinite
3 The SI unit of conductivity is
A. ohm-m
B. ohm-1m-1
C. ohm-m-1
D. ohm-1m
4 The charge carriers in gases are
A. electrons
B. ions
C. protons
D. ions and electrons
5 The speed of randomly moving electrons depends upon
A. pressure
B. volume
C. temperature
D. mass
6 Two point charges A and B separated by a distance R attract each other with a force of 12 x 10-3N. The force between A and B when the charges on them are doubled and distance is halved
A. 1.92 N
B. 19.2 N
C. 12 N
D. 0.192 N
7 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
8 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
9 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
10 The resistance of an incandescent lamp is
A. Smaller when switched on
B. Greater when switched off
C. The same whether it is switch off or switch on
D. Greater when switched on

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