Question

In a meter bridge with a standard resistance of $5\Omega$ in the left gap, the ratio of balancing lengths on the meter bridge wire is $2:3$. The unknown resistance is

• A. $3.3\Omega$
• B. $7.5\Omega$
• C. $10\Omega$
• D. $15\Omega$

Answer 1

Answer: (B)

$7.5\Omega$

For meter bridge ,
Unknown resistance,
$R=\frac{{\int }_2}{{\int }_1}\times X=\frac{3}{2}\times 5=7.5\Omega$