The diagram below shows a loop of wine carrying current l:
(I) What is the magnetic polarity of the loop that faces us?
(ii) With respect to the diagram how can we increase the strength of th
magnetic field produced by this loop?
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Answer: In rectangular coil the induced emf will remain constant because in this the case rate of change of area in the magnetic field region remains constant, while in circular coil the rate of change of area in the magnetic field region is not constant.
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