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Extension of Ammeter and Voltmeter

For a given f...

Question

For a given frequency, the deflecting torque in an induction type ammeter is directly proportional to

A

c u r r e n t^{2}

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B

c u r r e n t^{3}

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C

\sqrt{c u r r e n t}

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D

c u r r e n t

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Solution

The correct option is A $c u r r e n t^{2}$
In induction type meter, rms value is obtained.
$T_{d} = I^{2} . \frac{d m}{d θ}$

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