State faraday's law of electromagnetic induction ncert
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Hey !!
⊕ Whenever there is a change in magnetic flux linked with a coil, an emf is induced in the coil. The induced emf is proportional to the rate of change of magnetic flux linked with the coil.
ε ∝ ΔФ / Δt
⊕ Emf induced in the coil opposes the change in flux,
ε ∝ -ΔФ / Δt => ε = -k ΔΦ / Δt
where k is a constant of proportionality.
→ Negative sign represents opposition to change in flux.
In SI system Ф is in weber, t in second, ε in volt k = 1 ,
ε = - ΔФ / Δt
If the coil has N-turns then ε = -N ΔΦ / Δt
Good luck !!
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