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The variation of EMF with time for four types of generators are shown in the figures. Which amongst them can be called AC?
(a)
(b)
(c)
(d)
Options:
(a)
(b)
(c)
(d)
Solution:
1137 Upvotes
Verified Answer
The correct answer is:
(a), (b), (c) and (d)
The emf generated due to a rotating conductor in a generator is given by
$$
E=-\frac{d \phi_{\mathrm{B}}}{\mathrm{dt}}
$$
where, $\phi_B=$ magnetic flux linked with conductor From the above equation we can conclude that the emf generated is a varying function of time with opposite polarity. So, all the graph are correct for the given variations.
$$
E=-\frac{d \phi_{\mathrm{B}}}{\mathrm{dt}}
$$
where, $\phi_B=$ magnetic flux linked with conductor From the above equation we can conclude that the emf generated is a varying function of time with opposite polarity. So, all the graph are correct for the given variations.
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