JEE PHYSICS MCQ: ELECTRIC FIELDS AND CHARGES

1 Medium

1 of 1

Analyzing +4 | -1

Point charges

+ 4q, - q

and

+ 4q

are kept on the

x

-axis at points

x = 0,x = a

and

x = 2a

respectively, then

View answer and explanation

Correct option: C

All the charges are in unstable equilibrium

Option C (All the charges are in unstable equilibrium) is correct because while the net force on each charge is zero, any displacement will cause a net force, leading to instability.

More Questions from ELECTRIC FIELDS AND CHARGES

Practice All Chapter MCQs →

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
experience is (are) Statement-I: No 2 electric lines of force can intersect each other

Statement-II: tangent at any point of electric line of force gives the direction of electric field A force of

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