Question # 1

the force between two charge is 28 N. If paraffin wax of relative permittivity 2.8 is introduced between the charges as medium, then the force reduces to.

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25 N

20 N

10 N

15 N

Capacitance of a capacitor does not depend upon.

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Distance between plates

Area of plates

Electric field between plates

Medium between plates

For computation of electric flux, the surface area should be.

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Parallel

Flat

Curved

Spherical

One joule is equal to.

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1.6 x 10¹⁹ eV

1.6 x 10^-19 eV

6.25 x 10^-18 eV

6.25 x 10 ¹⁸ eV

The electric field created by positive charge is:

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Radially outward

Circular

Radially inward

Zero

Selenium is

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Insulator is dark

Insulator in light

Conductor in dark

Semi conductor in dark

NC-1 is the SI unit is

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Force

Charge

Current

Electric intensity

A capacitor stores energy in the form of.

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Magnetic field

Heat energy

Electrical energy

Mechanical energy

The force of Neutron due to field of 10² N/C is.

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1.6 x 10^-17N

1.6 x 10^-19N

Zero

1.6 x 10^-21N

The quantity time constant RC has units of.

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Charge

Time

Capacitance

Resistance

Two oppositely charged balls A and B attract the third ball C, when placed near them turn by turn The third ball C must be.

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Positively charged

Negatively charged

Electrically neutral

Positively and negatively charged

Which one of the following is correct

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All of above

Identify the practical application of electrostatic force.

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Inkjet printer

x rays

Laser

A.C. Generator

The work done is bringing a unit positive charge from infinity to that point in an electric field is called.

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Potential

Potential difference

Absolute potential

All of these

Presence of dielectric between two charges always.

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Reduces the electric force

Enhance the electric force

Does not effect electric force

Double the electric force

In Millikan's oil drop experiment a charged particle of mass 'm' is in equilibrium in an will

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Zero

g/2

g

2g

Due to polarization, electric field E.

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Increase

Decrease

First increases then decreases

Remain same

The electric field in some region of of space is uniform in magnitude and direction. Which one of the following five statements best desccribes the volume charge density (ρ) , in this region of space?

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ρ = 0

ρ decreases linearly in the direction of the electric field

ρ increases linearly in the direction of the electric field

ρ has a uniform value throughout the region

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Physics ICS Part 2 Chapter 12 Online MCQ's Test MCQs With Answers

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