Question

A galvanometer of resistance $100\, \Omega$ gives full scale deflection at $10 \, mA$ current. What should be the value of shunt so that it can measure a current of $100 \, mA$ ?

• A. $11.11 \, \Omega$
• B. $1.1 \, \Omega$
• C. $9.9\, \Omega$
• D. $4.4 \, \Omega$

Answer 1

Answer: (A)

$S=\frac{10 \times 10^{-3} \times 100}{(100-10) \times 10^{-3}}$
$=\frac{1000}{90}=11.11\,\Omega$