JEE Mains · Physics · STD 12 - 4. Moving charges and magnetism
If \(n\) represents the actual number of deflections in a converted galvanometer of resistance \(G\) and shunt resistance \(S\). Then the total current I when its figure of merit is \(K\) will be
- A \(\frac{ KS }{( S + G )}\)
- B \(\frac{( G + S )}{ nKS }\)
- C \(\frac{ nKS }{( G + S )}\)
- D \(\frac{n K ( G + S )}{ S }\)
Answer & Solution
Correct Answer
(D) \(\frac{n K ( G + S )}{ S }\)
Step-by-step Solution
Detailed explanation
Figure of merit \(\frac{ I _{ g }}{\theta}= K\) \(I _{ g }= Kn\) \(I =\frac{ I _{ g }}{ s }( G + S )\) \(I =\frac{ nK }{ S }( G + S )\)
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