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If the Current is Doubled, the Deflection is Also Doubled in - Physics

MCQ

If the current is doubled, the deflection is also doubled in

Options

  • a tangent galvanometer

  • a moving-coil galvanometer

  • both

  • none

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Solution

a moving coil galvanometer

The current and deflection dependence of a moving coil galvanometer is given by `i = k/(nAB)θ ⇒ i ∝ θ`

Therefore, if we double the current, the deflection also gets doubled.
However, in a tangent galvanometer, i ∝ tan θ;  that is, there is no direct relation between θ and current.
Hence, the correct option is (b).

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APPEARS IN

HC Verma Class 11, Class 12 Concepts of Physics Vol. 2
Chapter 14 Permanent Magnets
MCQ | Q 12 | Page 276
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