Exam-style question
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An emf-time graph shows a sinusoidal wave. What can be inferred about the nature of the induced emf in the circuit?.
Model answer
What a good answer should say
- The induced emf varies sinusoidally with time, indicating that it alternates in direction and magnitude.
- This is characteristic of alternating current (AC) systems.
Explanation
Why this works
The evidence of a sinusoidal emf-time graph shows that the emf changes direction periodically. This implies that the circuit operates with alternating current, which is essential for understanding AC power systems.
Thus, the conclusion is that the sinusoidal nature of the graph reflects the alternating behavior of the induced emf.
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