Question # 1

NC-1 is the SI unit is

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Force

Charge

Current

Electric intensity

The electric field created by positive charge is

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Radially inward

Zero

Circular

Radially outward

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

The product of resistance and capacitanc eis.

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Velocity

Force

Acceleration

Time

A capacitor stores energy in the form of.

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Magnetic field

Heat energy

Electrical energy

Mechanical energy

A force of 0.01 N is exerted on a charge 1.2 x 10^-5 C at a certain point. The electric field at that point is

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1.2 x 10⁴ N/C

1.2 x 10⁴ C/N

8.3 x 10² N/C

8.3 x 10^-2 N/C

Coulomb /volt is called.

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Farad

Ampere

Joule

Henry

The total flux through a closed surface.

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Directly proportional to shape and geometry

Independent of medium

Depend on shape and geometry

Dependent on medium and the charge enclosed

The electric intensity at infinite distance from the point charge is

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Infinite

Zero

Positive

Negative

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

The net charge on a capacitor magnitude of charge of charge

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Infinity

2 q

Q/2

Zero

The electric field lines are closer where the field is

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Strong

Weak

Uniform

Variable

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

Net charge enclosed by Gaussian surface is:

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zero

maximum

depend on intensity

none of all

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

Identify the practical application of electrostatic force.

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Inkjet printer

x rays

Laser

A.C. Generator

A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, Then

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The charge in the plates reduces and potencial difference increase

Potencial difference between the plates increase, stored energy decreases and charge remains the same

Potencial difference between the plates decreases, stored energy decreases and charge remains unchanged

None of them

Electric potential at a distance ''r'' from ''q'' is:

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V_r = 1/54πε_∘q/r₂

Vr=1/4πε_∘²q/r

V_r=1/4πε_∘2q/r

V_r=1/4πε_∘q²/r

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