Question regarding induced e.m.f

[anonymousZ10]

can we still induced e.m.f in a circuit if we switch on and off the circuit. Well, since induced e.m.f is proportional to the rate of change of magnetic flux. I guess alternating the switches can changes the magnetic flux of a circuit. Please correct me if I'm wrong ^_^ .

 

[TSny]

Hello, and welcome to PF!

Yes, you are right. For some circuits, the induced emf might be very small.

 

[Noctisdark]

You can, but a poor way of inducing current, you can't switch very fast and the coil in your circuit won't make it so perfect, you end up with few milli volts !

 

[anonymousZ10]

Hello, and welcome to PF!

Yes, you are right. For some circuits, the induced emf might be very small.

thank you :D

 

[anonymousZ10]

You can, but a poor way of inducing current, you can't switch very fast and the coil in your circuit won't make it so perfect, you end up with few milli volts !

Ah ! now i get it. why the L.E.D flashes once. Thanks