Can a Capacitor Be Used to Charge a Coil in a Magnetic Field?

[Queequeg]

A coil in a magnetic field produces a sinusoidal emf output, so why can't you just attach a capacitor to it to charge it? Is it simply because capacitors store energy in electric fields, so you would need an inductor?

 

[berkeman]

A coil in a magnetic field produces a sinusoidal emf output, so why can't you just attach a capacitor to it to charge it? Is it simply because capacitors store energy in electric fields, so you would need an inductor?

A parallel LC circuit immersed in a changing B-field will indeed develop an AC voltage across the capacitor. Why would you think it would not?

 

[Queequeg]

A parallel LC circuit immersed in a changing B-field will indeed develop an AC voltage across the capacitor. Why would you think it would not?

Hmm that would work and got me thinking, so besides an LC circuit could one also implement a rectifier diode for unidirectional current instead of the sinusoidal wave?

 

[berkeman]

Hmm that would work and got me thinking, so besides an LC circuit could one also implement a rectifier diode for unidirectional current instead of the sinusoidal wave?

Of course. What is the application?

 

[Queequeg]

It was just a discussion question for a lab, thanks!