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JEE PHYSICS MCQ: MAGNETIC EFFECT OF CURRENT

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Two galvanometers 'A' and 'B' require currents of

4 \mathrm{~mA}

and

7 \mathrm{~mA}

, respectively to produce the same deflection of 20 divisions. If '

\mathrm{S}_{\mathrm{A}}

' and '

\mathrm{S}_{\mathrm{B}}

' are their sensitivities, respectively, then

View answer and explanation

Correct option: D

\mathrm{S}_{\mathrm{A}} > \mathrm{S}_{\mathrm{B}}

Option D (

\mathrm{S}_{\mathrm{A}} > \mathrm{S}_{\mathrm{B}}

) is correct because sensitivity is inversely proportional to the current required for the same deflection, and galvanometer A requires less current.

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