PHYSICS
JAMB 2012 - Question 43
Physics 2012 JAMB Past Questions - Question 43: The current output from of an a.c source is given as I=10sin wt.The d.c equivalent of the current is
Choose the correct answers from the options given.
A:
B:
C:
D:
Correct Answer
B
Explanation
To find the DC equivalent of an AC current, we need to calculate the average value of the AC current waveform over a complete cycle. In this case, the AC current is given by I = 10sin(wt), where I is the instantaneous current and w is the angular frequency.
The average value of a sinusoidal waveform over a complete cycle is zero. This is because the positive and negative halves of the waveform cancel each other out when averaged over time.
Therefore, the DC equivalent of the given AC current is zero.
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