A straight wire of length L is bent into a semicircle. It is moved in a uniform magnetic field with speed v with diameter perpendicular to the field. The induced emf between the ends of the wire is

Question

Infinity Learn · Accepted Answer

Induced emf, $$e=Bvle$$ where le is the effective length between the ends of the bent rod .                                                                                                           ⇒$$e=Bv(2R)=2BvL$$$$π$$Here le $$=2R$$ $$=$$ $$2(L$$π$$)$$ Therefore e $$=$$ $$2vLB$$π

A straight wire of length L is bent into a semicircle. It is moved in a uniform magnetic field with speed v with diameter perpendicular to the field. The induced emf between the ends of the wire is

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