ECAT Pre General Science Physics Chapter 12 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 12 Electrostatics

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

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ECAT Pre General Science Physics Chapter 12 Electrostatics

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Question # 1

The value of electrical constant of proportionality k is

Question # 2

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

Question # 3

Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity will be

Question # 4

Ohm is the unit of

Question # 5

Some charge is being given to a conductor. Then its potential

Question # 6

The unit of resistivity is

Question # 7

The electrode connected with the positive terminal of the current source is called

Question # 8

The relation V = IR represents

Question # 9

A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes

Question # 10

106electrons are moving through a wire per second, the current developed is

Question # 11

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

Question # 12

The charge carriers in electrolyte are positive and negative

Question # 13

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

Question # 14

The unit of resistance is

Question # 15

Electron volt is the unit of

Question # 16

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

Question # 17

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

Question # 18

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

Question # 19

Solar cell converts sunlight directly into

Question # 20

The capacitance of a parallel plate capacitor depends upon

Question # 21

The capacity of a parallel plat capacitor depends on the

Question # 22

Cause of heat production in a current carrying conductor is

Question # 23

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 # 24

An electric charge at rest is

Question # 25

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

Question # 26

Electric generators which convert mechanical energy into

Question # 27

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

Question # 28

Resistance of a conductor is increased, the currant will

Question # 29

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

Question # 30

Heating effect caused by an electric circuit is written

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The SI unit of electric field intensity is
A. CN-1
B. NC-1or Vm-1
C. JC-1
D. AV-1
2 In bringing an electron towards another electron, electrostatic potential energy of system
A. Decreases
B. Increases
C. Remains uncharged
D. Becomes zero
3 The graphical representation of ohm's law is
A. hyperbola
B. straight line
C. ellipse
D. parabola
4 One coulomb per second is equal to
A. One volt
B. One ampere
C. One hom
D. One henry
5 A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is
A. Zero
B. 0.5Ω
C. 1.1Ω
D. 5.0Ω
6 If 2.2 kilowatt power is transmitted through 1 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
7 A (100 W , 200 W) bulb is connected to a 160 V power supply. The power consumption would be
A. 64 W
B. 80 W
C. 100 W
D. 125 W
8 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
9 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
A. 1840 KeV
B. 1/1840 KeV
C. 1 KeV
D. 920 KeV
10 Two electric bulbs of 200 W and 100 W have same voltage. If R1and R2be their resistance respectively then
A. R1= 2R2
B. R2= 2R1
C. R2 = 4R1
D. R1= 4R2

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