Mathematics · AC Circuits
Find the phase angle by which the current i1 lags or leads the voltage v1 if: v1 = 120 cos(120πt - 40°) V i1 = 2.5 cos(120πt + 20°) A
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1i1 leads v1 by 60°✓
- 2i1 lags v1 by 60°
- 3i1 lags v1 by 40°
- 4i1 leads v1 by 40°
Correct answer
i1 leads v1 by 60°
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