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JEE Main202225 Jun 2022Evening ShiftPhysicsCurrent ElectricityActual

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

Options

  1. AK S S + G
  2. BG + S n K S
  3. Cn K S G + S
  4. Dn K G + S S

Correct answer

D. n K G + S S

Step-by-step solution

Let current through galvanometer be I G and current through shunt resistance be I - I G . Given figure of merit K = I G n Then, total current, I = I G G + S S I = n K G + S S

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