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Calculate the value measured by Moving Iron when a sinusoidal voltage signal V(t)=20sin(ωt) is applied to it.

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Calculate the value measured by Moving Iron when a sinusoidal voltage signal V(t)=20sin(ωt) is applied to it.

(a) 14.14 V

(b) 20.15 V

(c) 16.18 V

(d) 22.18 V

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The correct choice is (a) 14.14 V

To explain: Moving iron instrument measures the r.m.s value of the input signal. The r.m.s value of the sinusoidal signal is 20÷√2=14.14 V.

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