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Interviewer: Why is a thicker conductor necessary to carry a current in A.C.as compared to D.C. ?
Candidate : An AC current goes up and down (drawing a sinusoid) and requires more space inside the wire, so the wire has to be thicker.
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External (to student) : “Why does a capacitor block DC but allow AC To pass through ?

Student: See, a capacitor is like this —| |— , OK. DC comes
straight, like this ———-, and the capacitor stops it. But AC,goes UP, DOWN, UP DOWN and jumps right over the capacitor!”

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Interviewer: How will you tell if that wall outlet carries AC or DC?
Candidate: I will put my finger in. If it is pushed away, it is AC. If it gets stuck, it was DC.
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Interviewer: How do you start a synchronous motor?
Candidate: Vrrrrrrrmmmmmmmmmmmmmmmmmmm (in rising pitch)
Interviewer: Stop! Stop!
Candidate: rrrrrrrmmmmmmmmmmmmmmmmmmmm (in falling pitch)
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