Physics
NULL
Medium
Question
An alternating current is represented by the equation I = I∫sinÏ€t which of the following equation represents an alternating current of frequency and amplitude twice that of the above current ?
A
I = 2I∫Sin(Ï€t/2)
B
I = 2I∫Sin(2Ï€t)
✓ Official correct answer
C
I = 2ISinπt
D
I = I∫sin(2Ï€t)
Community credibility
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A
I = 2I∫Sin(Ï€t/2)
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B
I = 2I∫Sin(2Ï€t)
No member explanations yet for this option.
C
I = 2ISinπt
No member explanations yet for this option.
D
I = I∫sin(2Ï€t)
No member explanations yet for this option.
Explanation
Doubling amplitude gives coefficient 2I0, and doubling frequency doubles the angular frequency term in the sine argument from πt to 2πt, giving I=2I0 sin(2πt).
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