First slide

Electrostatic force

Question

Two pith balls each with mass m are suspended from insulating threads. When the pith balls are given equal positive charge Q, they hang in equilibrium as shown. We now increase the charge on the left pith ball from Q to 2Q while leaving its mass essentially unchanged. Which of the following diagrams best represents the new equilibrium configuration?

Moderate

A
B
C
D

Solution

Both angles will remain same at any time. It is because, force on the balls will be equal and opposite, although they have different charges. $ϕ > θ,$ because force has increased. Angles would have been different if masses were different.

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App