Question

A galvanometer gives full scale deflection with $0.2\, A$ in a coil shown in the figure. The resistance of its coil is $10\,\Omega$ . How much shunt resistance is required to convert it into an ammeter to read current upto $1.8\, A$ ?

• A. $1.25\,\Omega$
• B. $2.5\,\Omega$
• C. $5.0\,\Omega$
• D. $10.0\,\Omega$

Answer 1

Answer: (A)

$1.25\,\Omega$

Answer 2

Potential difference across galvanometer and shunt is same.