Question

A $72$ Ω galvanometer is shunted by a resistance of $8$ Ω. The percentage of the total current which passes through the galvanometer is

• A. 0.1%
• B. 10%
• C. 25%
• D. 0.25%

Answer 1

Answer: (B)

10%

Answer 2

From the given setup

$y × R_G = (x – y)(R_S)$

$⇒ y × 72 = (x – y) × 8$

$⇒ 9y = x – y$

$⇒ y = \frac{x}{10}$ or $10\%$ of $x$

Therefore, the correct Option is (B): $10\%$