First slide
Magnetic flux and induced emf
Question

The armature of a demonstrator generator consists of a flat square coil of side 4cm and 200 turns. The coil rotates in a magnetic field of 0.75 T. The angular speed so that a maximum emf of 1.6V is generated is

Easy
Solution

εmax=NA0Bω 

ω=εmaxNA0B

    =1.6200×16×104(0.75)

     =203rad/s

 

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