Question

A galvanometer of resistance $15O$ gives full scale deflection for a current of $2\, mA$. Calculate the shunt resistance needed to convert it into an ammeter of range $5\,A$

• A. $0.178\,\Omega$
• B. $0.002\,\Omega$
• C. $0.006\,\Omega$
• D. $5\,\Omega$

Answer 1

Answer: (C)

$0.006\,\Omega$

Answer 2

Resistance of shunt needed to convert it into ammeter is $S =\frac{I_{g} G}{I-I_{g}}$ $=\frac{2 \times 10^{-3} \times 15}{5-2 \times 10^{-3}}=0.006\, \Omega$