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Electronics and Communication Engineering (ECE) : Electromagnetic Field Theory - Quiz(MCQ)
Alternating current measured in a transmission line will be
A)
Zero
B)
Peak value
C)
Average value
D)
RMS value

Correct Answer : Option (D) :   RMS value


Explanation : 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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