Question # 1

The electric flux through closed surface depends upon

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Charge

Medium

Geometry

Charge and Medium

When the medium is insulator the elecrostatic force between the charges is

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Decreased

Zero

Increased

None of above

Metals are good conductors of electricity because they have

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Large number of bounded electrons

Small number of electrons

Large number of free electrons

Small number of free electrons

A capacitor is perfect in insulator for.

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Alternating current

Sparking current

Eddy current

Direct current

The toner of printer is given

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Positive charge

Negative charge

Neutral

First positive then negative

A charge Q is divided into tweo parts q and Q-q and seperated by a distance R. The force of equilibrium between them will be maximum when:

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q=Q/4

q=Q/2

q=Q

None of these

Concept of electric field lines was given by:

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Michelson

Henry

Michael faraday

Oersted

In photocopier, then drum is coated with layer of.

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Aluminium

Copper

Selenium

silver

Electric flux is a

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Vector quantity

Scalar quantity

Both (a) and (b)

None of above

Electro encephalon graph is the diagnostic test for the working of.

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Eye

Heart

Brain

Lungs

Flux through any closed surface is:

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1/ε²_∘ times the total charge enclosed in it

ε²_∘ time the total charge enclosed in it

1/ε_∘ ties the total charge enclosed in ti

ε_∘ time the total charge enclosed in it

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

Net charge enclosed by Gaussian surface is:

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zero

maximum

depend on intensity

none of all

Coulomb's force is:

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Conservative force

None conservative force

Similar to frictional force

None of the above

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

Special organs called ampullae of lorenzenite are present in.

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Bats

Cats

Dogs

Sharks

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

The electric field created by positive charge is

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Radially inward

Zero

Circular

Radially outward

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