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Question 31685
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Current Electricity: Galvanometer Sensitivity MCQ

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Galvanometer SensitivityHardQuestion 31685

Question

Current sensitivity of a galvanometer (deflection per unit current) can be increased by:
  1. A
    Increasing the number of turns N
    Correct
  2. B
    Reducing magnetic field B
  3. C
    Increasing spring constant k
  4. D
    Reducing coil area A

Correct answer

Increasing the number of turns N

Explanation

Deflection θ = NABI/(k). Sensitivity θ/I = NAB/k. Increase N or A or B, or decrease spring constant k. All improve sensitivity.

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