Question

The current flowing through a coil of resistance 900 ohms is to be reduced by 90%. What value of shunt should be connected across the coil

• A. $90\Omega$
• B. $100\Omega$
• C. $9\Omega$
• D. $10\Omega$

Answer 1

Answer: (B)

$100\Omega$

Answer 2

$i_{g} = (100 - 90)\%$ of $i = \frac{i}{10}$

⇒ Required shunt

$S = \frac{G}{(n - 1)} = \frac{900}{(10 - 1)} = 100\Omega$