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

AI Thread Summary
A coil in a magnetic field generates a sinusoidal emf output, which can indeed charge a capacitor when part of a parallel LC circuit. The discussion highlights that capacitors store energy in electric fields, while inductors are necessary for energy storage in magnetic fields. Implementing a rectifier diode can convert the AC voltage to unidirectional current, making it suitable for various applications. The conversation centers around the feasibility of using these components together in a lab setting. Overall, the integration of capacitors, inductors, and rectifiers in such circuits is viable and can be explored further.
Queequeg
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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?
 
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Queequeg said:
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?
 
berkeman said:
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?
 
Queequeg said:
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?
 
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It was just a discussion question for a lab, thanks!
 

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