Question

Q33) A Galvanometer has a resistance of 75 Ohm and its full scale deflection
current is 25 mA, We have to convert it into an Ammeter of 100 mA, then the
required shunt value 's' will be
a) 10 ohm
b)5 ohm
c) 75 ohm
d) 25 ohm

Answer 1

Answer:

option d. 25 ohms

Explanation:

Given:

resistance of Galvanometer, G=75 ohms

Current through galvanometer, Ig=25mA

Total Current=100mA

To find:

Shunt resistance S

Formula Used:

S=Ig.G/(I-Ig)