Question

Choose the right answer from the following. The resistance in ohms in the four arms of a wheatstone bridge is as follows. In which combination of the following is the bridge balanced?

• A. $\frac{3}{5}=\frac{5}{7}$
• B. $\frac{2}{3}=\frac{4}{6}$
• C. $\frac{8}{9}=\frac{10}{11}$
• D. $\frac{2}{2}=\frac{3}{5}$

Answer 1

The correct option is B

$\frac{2}{3}=\frac{4}{6}$

Wheatstone bridge

For a balanced Wheatstone bridge,

$\frac{P}{Q}=\frac{R}{S}$

and

$\frac{2}{3}=\frac{4}{6}=\frac{2}{3}$

$\frac{2}{3}=\frac{2}{3}$

Hence, option B is correct.