CBSE - X - Physics
sir please read the question very carefully
how how coil rotates in oppsite direction after every half rotation
Consider coil ABCD,
Assume that initially arm AB is towards left and arm CD is towards right. Ab is moving up and CD is moving down. So, current is in a particular direction.
After half rotation, AB will move towards right and CD will move towards left. So, now AB is moving down and CD is moving UP. So, current will be in opposite direction.
It is not physically moving in opposite direction. It is the interpretation of up and down which results in AC current.
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