A rectangular coil of length 0.5 m and breadth 0.2 m has a resistance of 10 ohm. The coil is placed with its plane perpendicular to a uniform magnetic field of induction 0.05 T. If the magnetic induction is uniformly reduced to zero in time 10^-4 second, find the emf and current induced in the coil.
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Answer:
Area = length × breadth (rectangular cross section)
= 0.5×0.2 =0.1 m^2
flux = flux density × area = 0.05 × 0.1= 0.005 wb
emf = d phi/ dt = ((0.005)/(10^-4) )= 50 v
current = emf / resistance = 50/10 =5 amps
Explanation:
find the area and using tesla value find the flux produced
then by using
faradays equation
emf = -N (dphi/dt)
find the emf.then by using resistance finding out the current