You are given a fixed length of wire to design a generator. For a given magnetic field strength and given frequency of rotation, will you use one turn or two turn square coil to generate maximum peak e.m.f. ?

An emf induced in a coil rotating in a uniform magnetic field is given by

The peak value of alternating e.m.f. in a generator is given by e_(0) =

A wire of length l is used to form a coil. The magnetic field at its centre for a given current in it is minimum if the coil has

The e.m.f. induced in a coil of wire, which is rotating in a magnetic field, does not depend on

If n is number of turns , B magnetic field strength , A area of coil and K torsional constant of suspension wire , then sensitivity is given by

A length L of wire carries a current i . Show that if the wire is formed into a circular coil, then the maximum torque in a given magnetic field is developed when the coil has one turn only, and that maximum torque has the magnitude tau=L^2iB/4pi

A length L of wire carries a current i . Show that if the wire is formed into a circular coil, then the maximum torque in a given magnetic field is developed when the coil has one turn only, and that maximum torque has the magnitude tau=L^2iB/4pi