Electrostatics Question 682

Question: Three charges +q, +2q and +4q are connected by string . What is ration of tension in the strings AB and BC?

Options:

A) 1 : 2

B) 1 : 3

C) 2 : 1

D) 3 : 1

Show Answer

Answer:

Correct Answer: B

Solution:

[b] $ T _{AB}=\frac{kq\cdot 2q}{d^{2}}+\frac{kq\cdot 4q}{{{( 2d )}^{2}}}=\frac{3kq^{2}}{d} $

$ T _{BC}=\frac{k\cdot 4q\cdot 2q}{d^{2}}+\frac{kq\cdot 4q}{{{( 2d )}^{2}}}=\frac{9kq^{2}}{d} $



NCERT Chapter Video Solution

Dual Pane