Answer:
Normally emf can be calculated by the following formula
e=N*(dф/dt) where dф/dt = rate of change of flux linkages

In actual practice it is given as e=-[N*(dф/dt) ] because as per lenzs law the voltage induced in a direction to oppose the very cause for it i.e., change in flux linkages.


vydehi
First answer by Vydehi. Last edit by Vydehi. Contributor trust: 0 [recommend contributor recommended]. Question popularity: 0 [recommend question].