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

What is the current is a 2 x 106ohm resistor having a potential difference of 2 x 103volts?

Question # 2

The energy stored in a charge capacitor

Question # 3

If two bulbs one of 60 W and other of 100 W are connected in parallel, then which one of the following will flow more?

Question # 4

Battery is charged in motor cars, which is based on

Question # 5

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

Question # 6

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 # 7

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

Question # 8

The unit of conductance is

Question # 9

One electron volt is equal to

Question # 10

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

Question # 11

One coulomb per second is equal to

Question # 12

The SI unit of permitivity is

Question # 13

One moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is

Question # 14

An electric dipole is at the centre of a hollow sphere of radius r. The total normal electric flux through the sphere is (here Q is the charge and d is the distance between the two charges of the dipole)

Question # 15

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

Question # 16

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 # 17

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 # 18

The electric lines of force are

Question # 19

Electric flux is defined by the relation

Question # 20

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

Question # 21

The thermistors are usually made of

Question # 22

In a charged capacitor the energy is stored in

Question # 23

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

Question # 24

A closed surface contains two equal and opposite charges. The net electric flux from the surface will be

Question # 25

A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts

Question # 26

The electric flux is linked with a surface will be maximum when

Question # 27

Resistance of a conductor depends upon

Question # 28

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

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The relation V = IR represents
A. Ampere law
B. Faraday's law
C. Ohm's law
D. Len's law
2 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
3 Potentiometer is more sensitive than voltmeter, because
A. Voltmeter has a very high resistance
B. Voltmeter has a very low resistance
C. Potentiometer does not draw any current from a source of unknown potential difference
D. Potentiometer is sensitive
4 Electric generators which convert mechanical energy into
A. solar energy
B. thermal energy
C. kinetic energy
D. electrical energy
5 Coulomb force, when any material medium is placed between two charges
A. Increases
B. Decreases
C. Remain unchanged
D. None of these
6 Resistance of a conductor depends upon
A. the quantity of current passing through it
B. the voltage applied between its end
C. its dimensions, physical state and nature of its material
D. all of the above
7 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
8 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
9 Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be
A. 0.52 A
B. 1 mA
C. 0.7 mA
D. 1.4 A
10 The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as
A. voltmeters
B. resistance
C. electrode
D. current

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