JEE Mains · Physics · STD 12 - 4. Moving charges and magnetism
A moving coil of galvanometer when shunted with \(2\,\Omega\) resistance gives a full scale deflection for a current of \(500\) mA. When a resistance of \(470\,\Omega\) is connected in series it gives a full scale deflection for \(10\) V potential applied on it. The value of resistance of galvanometer coil is __________ \(\Omega\).
- A 25
- B 50
- C 75
- D 100
Answer & Solution
Correct Answer
(B) 50
Step-by-step Solution
Detailed explanation
Let \(G\) be the resistance of the galvanometer and \(I_g\) be the current required for full scale deflection. When the galvanometer is shunted with \(S = 2\,\Omega\), it acts as an ammeter of range \(I = 500\text{ mA} = 0.5\text{ A}\). The potential difference across the…
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