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

Question # 2

A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance

Question # 3

Physicist George Simon ohm was a

Question # 4

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

Question # 5

The ohm's is defined as

Question # 6

If the two charges in Coulomb's law have double distance between them, then electric force

Question # 7

A hollow insulated conduction sphere is given a positive charge of 10μC. What will be the electric field at the centre of the sphere if its radius is 2 meters?

Question # 8

Resistance of a conductor is increased, the currant will

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

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 # 13

The charge carriers in gases are

Question # 14

Ohm is the unit of

Question # 15

The earth's potential is taken as

Question # 16

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

Question # 17

The relation between charge 'Q' and current 'I' is given by

Question # 18

A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. The quantity that remains unchanged is

Question # 19

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

Question # 20

The resistivity of a substance depends upon the

Question # 21

The electric intensity outside the two oppositely charged parallel metal plates is

Question # 22

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

Question # 23

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

Question # 24

The speed of randomly moving electrons depends upon

Question # 25

The minimum charge on any object can not be less than

Question # 26

The resistance of a conductor does not depend on its

Question # 27

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 # 28

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

Question # 29

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 # 30

The SI unit of electric flux is

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Electric potential of earth is taken to be zero because the earth is good
A. Semiconductor
B. Conductor
C. Insulator
D. Dielectric
2 A 100 W, 200 V bulb is connected to a 160 volts supply. The actual power consumption would be
A. 64 W
B. 80 W
C. 100 W
D. 125 W
3 Which one of the following has larger value of relative permitivity Erat room temperature?
A. Vaccum
B. Air
C. Glass
D. Water
4 The earth's potential is taken as
A. Negative
B. Positive
C. Zero
D. Infinite
5 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
6 A uniform resistance wire of Length L and diameter d has a resistance R. Another wire of same material has length, 4L and diameter 2d, the resistance will be
A. 2 R
B. R
C. R/2
D. R/4
7 Three resistors of resistance R each are combined in various ways. Which of the following cannot be obtained?
A. 3RΩ
B. 2R/4Ω
C. R/3Ω
D. 2R/3Ω
8 A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. The quantity that remains unchanged is
A. Charge Q
B. Potential V
C. Capacity
D. Energy U
9 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
A. 3.9
B. 4
C. 4.2
D. 6
10 The minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is
A. 4/5Ω
B. 5/4Ω
C. 20Ω
D. 0.05 Ω

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