Question

The resistances in the two arms of the meter bridge are $5\, \Omega$ and $R\, \Omega$ respectively. When the resistance $R$ is shunted with an equal resistance, the new balance point is at $1.6l_1$. The resistance $R$ is

• A. $10\, \Omega$
• B. $15\, \Omega$
• C. $20\, \Omega$
• D. $25\, \Omega$

Answer 1

Answer: (B)

$15\, \Omega$

Answer 2

In the first case,