A galvanometer of resistance G, is shunted by a resistance S ohm. To keep the main…

Physics · Class 12 · CBSE — Moving Charges and Magnetism

A galvanometer of resistance G, is shunted by a resistance S ohm. To keep the main current in the circuit unchanged, the resistance to be put in series with the galvanometer is:

  1. \(\frac{G^{2}}{(S+G)}\)
  2. \(\frac{G}{(S+G)}\)
  3. \(\frac{S^{2}}{(S+G)}\)
  4. \(\frac{S G}{(S+G)}\)

Answer

(C) S^ 2 (S+G)

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