Mathematics · Alternating Current
A sinusoidally varying alternating current with a frequency of 50 Hz has an RMS value of 20 A. Which of the following is the correct expression for its instantaneous value (i)?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1i = 40 sin(100πt) A
- 2i = 20 sin(50πt) A
- 3i = 28.28 sin(100πt) A✓
- 4i = 20 sin(100πt) A
Correct answer
i = 28.28 sin(100πt) A
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