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2) I am unsure why the answer is A.. I thought the answer would be C ( by using flemings left hand rule)

5) If we resolve forces, we get R - mg = mv^2/r , so R = mg + mv^2/r but this isn't the correct answer.. (the correct answer is D)

6) I know when lines of flux are cut, an EMF and therefore a current is induced but how do I get the answer?

thanks