MHT CET · Physics · Current Electricity
In conversion of moving coil galvanometer into an ammeter of required range, the resistance of ammeter so formed is
\([\mathrm{s}=\) shunt and \(\mathrm{G}=\) resistance of galvanometer \(]\)
- A \(\frac{S+G}{S G}\)
- B \(\frac{S G}{S-G}\)
- C \(\frac{S G}{S+G}\)
- D \(\frac{S-G}{S G}\)
Answer & Solution
Correct Answer
(C) \(\frac{S G}{S+G}\)
Step-by-step Solution
Detailed explanation
(D)
\(\begin{array}{l}
\frac{1}{R}=\frac{1}{G}+\frac{1}{S}=\frac{G+S}{G S} \\
\therefore R=\frac{G S}{G+S}
\end{array}\)
\(\begin{array}{l}
\frac{1}{R}=\frac{1}{G}+\frac{1}{S}=\frac{G+S}{G S} \\
\therefore R=\frac{G S}{G+S}
\end{array}\)
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