Questions
An elliptical loop having resistance R, of semi major axis a, and semi minor axis b is placed in a magnetic field as shown in the figure. If the loop is rotated about the x-axis with angular frequency , the average power loss in the loop due to Joule heating is:
detailed solution
Correct option is B
Magntic flux=ϕ=BAcosωt=B(πab)cosωtInduced emf =V=dϕdt=Bπabω sinωtPeak emf=V0=BπabωRms emf =Vrms=V02=Bπabω2 Average Power =P=Vrms2R=Bπabω221RTalk to our academic expert!
Similar Questions
A square wire loop, of side a has a long straight wire carrying a constant current i that passes through the centre of the loop and perpendicular to its plane as shown in Fig.
The current induced in the square loop is
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