Question

The value of R in the given figure so that there is no current in the $10\Omega$ resistor is.

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

Answer 1

The correct option is D $10\Omega$

For this Wheatstone bridge to be in the balanced condition, $20\times 20=R\times 40$
Implies, $R=10\Omega$