i)Sketch on the axis below a graph of the e.m.f generated against the angle as the coil rotates from 0⁰ to 90⁰ and from 90⁰...

i)Sketch on the axis below a graph of the e.m.f generated against the angle as the coil rotates from 0⁰ to 90⁰ and from 90⁰ to 180⁰.

ii)Give reasons for the changes in the e.m.f as the coil rotates from 0⁰ to 180⁰.

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At 0⁰ the coil cuts the field lines perpendicularly hence maximum induced e.m.f
-As the coil moves from 0⁰ to 90⁰ the angle at which the coil cuts the field line reduces until 90⁰ when the coil is parallel to the field lines hence no induced e.m.f.
-From 90⁰ the angle at which the coil cuts the field lines increases until 180⁰ when the coil is perpendicularly to the field line again hence max induced current at 180⁰.

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Kavungya answered the question on October 17, 2019 at 11:22

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