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MHT CET2018PhysicsCurrent Electricity

The deflection in galvanometer falls to 1 4 t h when it is shunted by 3 Ω . If additional shunt of 2 Ω is connected in parallel to earlier shunt, the deflection in galvanometer falls to

Options

  1. A1 2
  2. B1 3 r d
  3. C1 4 t h
  4. D1 8.5 t h

Correct answer

D. 1 8.5 t h

Step-by-step solution

I − I 4 = 3 I 4 R I 4 = 3 I 4 × 3 R = 9 Ω I = I 1 + I 2 ...(1) 9 I 1 = 6 5 I 2 ...(2) ⇒ 15 2 I 1 = I 2 Using equation (1) I = I 1 + 15 2 I 1 = 17 2 I 1 I 1 = 2 I 17 I 1 = I 17 / 2 = I 8.5

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