Question

The resistance of each arm of Wheatstone Bridge is $10\Omega$. A resistance of 10$\Omega$ is connected in series with the galvanometer then equivalent resistance across battery will be

• A. $10\Omega$
• B. $15\Omega$
• C. $20\Omega$
• D. $40\Omega$

Answer 1

Answer: (A)

Balanced bridge
$\therefore 10\Omega$