Question # 1

A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J

Choose an answer

5

0.5

0.005

50

The charge carriers in gases are

Choose an answer

electrons

ions

protons

ions and electrons

The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is

Choose an answer

Q=V/C

Q=C/V

Q=1/2CV

Q=CV

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?

Choose an answer

Zero

5μC m^-2

20μC m^-2

8μC m^-2

The unit of resistance is

Choose an answer

volt

ampere

ohm

coat

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

Choose an answer

3.9

4

4.2

6

When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to

Choose an answer

One joule

One erg

One electron volt

None of these

Battery is charged in motor cars, which is based on

Choose an answer

Chemical effect

Magnetic effect

Electric effect

None

Resistance of a conductor depends upon

Choose an answer

the quantity of current passing through it

the voltage applied between its end

its dimensions, physical state and nature of its material

all of the above

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

Choose an answer

2R

4R

16R

Zero

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

Choose an answer

The electric filed is zero outside the shell

The electric field is zero everywhere

The electric field is zero in the region inside the shell

The electric field is non-zero in both regions outside and inside the shell

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

Choose an answer

cathode

anode

electrolyte

position

Resistor is a device which convert electric energy to

Choose an answer

Heat energy

Chemical energy

Elastic energy

All of the above

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

Choose an answer

0.1 watt

1 watt

10 watt

100 watt

In a voltmeter the conduction takes place due to

Choose an answer

Electrons only

Holes only

Electrons and holes

Electrons and ions

Capacitance of two or more capacitors

Choose an answer

Increases in series combination

Increases in parallel combination

Remains unchanged

None of the above

A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is

Choose an answer

8 J

16 J

4 x 10^-3J

2 x 10^-3J

The capacitance of a parallel plate capacitor depends upon

Choose an answer

Area of the plates

Separation between the plates

Medium between the plates

All of the above

The SI unit of electric flux is

Choose an answer

Weber

Nm²C^-1

NmC^-1

Nm^-2C

If the distance between the plates of a parallel plate condenser of capacity 10μF is doubled then new capacity will be

Choose an answer

5μF

20μF

10μF

15μF

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

Choose an answer

1/R

1/R²

R

R²

Force acting upon a charged particle kept between the plates of a charged condenser if F. IF one of the plates of the condenser is removed, force acting on the same will become

Choose an answer

Zero

F/2

F

2F

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

Choose an answer

Maximum

Minimum

Zero

Infinite

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

Choose an answer

200 W

302.5

250 W

350 W

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

Choose an answer

64 W

80 W

100 W

125 W

The conductivity of a superconductor is

Choose an answer

Infinite

Very large

Very small

Zero

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

Choose an answer

Be more on the smaller sphere

Be more on the bigger sphere

Be equal on both the sphere

Depend on the nature of the material of the sphere

The earth's potential is taken as

Choose an answer

Negative

Positive

Zero

Infinite

The resistance of a conductor does not depend on its

Choose an answer

mass

resistivity

length

cross-sectional area

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

Choose an answer

Becomes two-fold

Becomes four-fold

Remains the same

None of these

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

Choose an answer

200 J

100 J

1000 J

400 J

More Classes

Other Links

ECAT Pre General Science Physics Chapter 12 Electrostatics Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer