Question # 1

Due to polarization, electric field E.

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Increase

Decrease

First increases then decreases

Remain same

The electrostatic force between two charges is 42 N, If we place a dielectric of E_y=2.1 between the charges then the force become equal to.

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42 N

88.2 N

20 N

2 N

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 electrical intensity is equal to:

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-Δr/Δv

Δv/Δr

Δv/Δv

-Δv/Δr

The quantity time constant RC has units of.

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Charge

Time

Capacitance

Resistance

Electric field intensity at a point is defined by the relation.

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E= q/F

E = F/q

E = qF

E = F/q2

A proton is about 1840 time than an electron. When it is accelerated by a potencial difference if 1 kV, its kinetic energy will be:

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1884 ke V

1/1840 keV

1 keV

920 keV

S.I unit of strength of electric field is

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J/C

C/V

V/C

N/C

The leV =

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1.6x10-19C

1.6x10-11J

1.6x10-19J

1.6x10-11C

Selenium is a

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Insulator

Photoconductor

Conductor

First insulator then conductor

A charge on 4 coulomb is in the field of intensity 4N/C the force on the charge is.

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Uniform

Non uniform

Weak

Strong

An electric field cannot deflect

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X-rays

a-particles

ß-particles

None of these

If both the magnitude of charges and distance between them is doubled, then coulomb's force will be.

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Doubled

Hlaf

Remain same

One fourth

If a charged body is moved against the electric field it will gain.

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P.E.

K.E.

Mechanical energy

Electrical potential energy

The electric potential at a mid point in an electric dipole is.

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0 V

0.5 V

1 V

1.5 V

The fact that electric field exist in space around an electrical charge is

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Electrical property

Gravitational property

Intrinsic property of nature

Extrinsic property of nature

If a charge body moved against the electric field it will again

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Potential energy

K.E

Mechanical Energy

Electric potential energy

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

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Physics Fsc Part 2 Chapter 1 Online Test MCQs With Answers

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