CBSE Class 12-science Answered
A circular coil of N turns and radius R is kept normal to a magnetic field given by B=BoCoswt. Deduce an expression for emf induced in this coil. State the rule which helps to detect the direction of induced current?
Asked by Mrinal | 25 Dec, 2012, 07:12: PM
Expert Answer
Area of the coil, A = ?r2
Magnetic field of the coil, B = Bocos?t
=> Magnetic flux linked with the coil, ? = NB.A
=> ? = NBA cos0
=> ? = NBA
Induced emf, e = - d?/dt = ?NABosin?t
Flemings right hand rule helps to detect the direction of induced current.
Answered by | 25 Dec, 2012, 10:25: PM
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