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Alternating current measured in a transmission line will be

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in Electromagnetic Theory by (188k points)
Alternating current measured in a transmission line will be

(a) Peak value

(b) Average value

(c) RMS value

(d) Zero

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Asked question is from Conductors in section Electric Fields in Material Space of Electromagnetic Theory

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Correct option is (c) RMS value

To explain I would say: The instantaneous current flowing in a transmission line, when measured using an ammeter, will give RMS current value. This value is 70.7% of the peak value. This is because, due to oscillations in AC, it is not possible to measure peak value. Hence to normalise, we consider current at any time in a line will be the RMS current.

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