JEE Main · PhysicsHard
A galvanometer of resistance $G$ is shunted by a resistance $S$. To increase the range of the galvanometer to $n$ times its original value, what should be the value of $S$?
- A.$\frac{G}{n - 1}$
- B.$\frac{G}{n}$
- C.$G(n - 1)$
- D.$\frac{G}{n + 1}$
Show correct answer & step-by-step solution
Correct answer: A — $\frac{G}{n - 1}$
Solution
The shunt resistance must satisfy . For , we have , hence .
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