Question

When a galvanometer is shunted with a 4Ω resistance, the deflection is reduced to one-fifth. If the galvanometer is further shunted with a a 2Ω wire, determine current in galvanometer now if initially current in galvanometer is I₀ (given main current remains same).

• A. $\frac{I_0}{13}$
• B. $\frac{I_0}{5}$
• C. $\frac{I_0}{8}$
• D. $\frac{5I_0}{13}$

Answer 1

The correct option is A

$\frac{I_0}{13}$

In parallel, current distrbutes in inverse ratio of resistance