Question

In the figure there is no deflection in the galvanometer. Then $R$ is equal to

• A. $2\Omega$
• B. $30\Omega$
• C. $6\Omega$
• D. $\frac{2}{3}\Omega$

Answer 1

Answer: (C)

No current in the galvanometer means, wheatstone bridge is balanced.
$\frac{2\Omega }{10\Omega }=\frac{R}{30}$ or $R=6\Omega$.