JEE PHYSICS MCQ: ELECTRIC FIELDS AND CHARGES

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Flux coming out from a unit positive charge enclosed in air is

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Correct option: B

{\left( {{\varepsilon _0}} \right)^{ - 1}}

Option B (

{\left( {{\varepsilon _0}} \right)^{ - 1}}

) is correct because Gauss's law states that the electric flux through a closed surface is equal to the charge enclosed divided by the permittivity of free space.

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Assertion:- Electric field lines do not cut at any point.
Reason:- At any point, there is only one direction of electric field. Statement-I: A positive point charge is brought in an electric field, the electric field at neary by point will increase

Statement-II: Electric field produced by charge may favour the existing electric filed Two particles having equal mass and charge
are separated by a distance

r.

The force(s) they
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4N

is acting between two charges in air if the space between them is completely filled with glass

\left( {{\varepsilon _r} = 8} \right)

, then the new force will be ……

N

An electron is placed at centre of a conducting sphere of radius 0.2 metre having charge

5 \times {10^{ - 2}}

coulomb. The force of on the electron is ________ N