Electromagnetic Induction - Result Question 5
5. A wire loop is rotated in a magnetic field. The frequency of change of direction of the induced e.m.f. is
[2013]
(a) twice per revolution
(b) four times per revolution
(c) six times per revolution
(d) once per revolution
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Answer:
Correct Answer: 5. (a)
Solution:
- (a) This is the case of periodic EMI
From graph, it is clear that direction is
changing once in $\frac{1}{2}$ cycle.
