For Faraday and Lenz's Law:
Did an increasing magnetic flux generate any current in the coil? decreasing flux?
Did the induced magnetic field always oppose the change in flux?
Faraday's law
the induced emf along any moving or fixes pathe in a constant or changing magentic field is equal to the rater at which the magnetic flux sweeps out across the path that is
e = - d(phi)/dt
and from magnetic flux
Phi = B*A cos theta
if the area is constnat then Faraday's law is
e = - A dB/dt
if the coil has N turns then
e = -N*A dB/dt
and the coil having the resistance R then the changing magnetic field produces current in the coil
Lentz's Law
The induced current always opposes the change in magnetic flux , but not the flux
Did the induced magnetic field always oppose the change in flux? No the induced current opposes the change in magnetic flux
in Faraday's law e = -dphi/dt
the -ve sign indicates the polarity of the induced current
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