Question

What is the shunt resistance \(S\) needed if the galvanometer current \(I_g\) is \(8\%\) of the total current \(I\)?

• A. \(\frac{2G}{23}\)
• B. \(\frac{8G}{23}\)
• C. \(\frac{23G}{2}\)
• D. \(\frac{G}{23}\)

Hint:

In a galvanometer–shunt combination, use \(I_gG = I_sS\). The shunt carries the majority of the current, protecting the galvanometer from large currents.

Answer 1

The Correct Option is A