JEE PHYSICS MCQ: ELECTRIC FIELDS AND CHARGES

1 Medium

1 of 1

Analyzing +4 | -1

Assertion: Two identicalballs are charged by

q

. They are suspended from a common point by two insulating threads

l

each. In equilibrium the angle between the threads is

180^{\circ}

. (Ignore gravity)

Reason: In equllibrium tension in the springs is

T=\frac{1}{4 \pi \varepsilon_0} \times \frac{q \cdot q}{l^2}

View answer and explanation

Correct option: C

Assertion is true & Reason is false

Option D (Assertion is false and Reason is true) is incorrect. The assertion is true, but the reason is false because the tension is calculated with the distance between the balls as 2l.

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