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
Messages
24
Reaction score
0
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?
 
Physics news on Phys.org
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?
 
  • Like
Likes 1 person
It was just a discussion question for a lab, thanks!
 

Thread 'Rolling without slipping on a curved surface'

Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
View full post »

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »

Similar threads

LC oscillations - two capacitors and an inductor
Replies
15
Views
601
Why can we model spherical capacitor with two dielectrics as two capacitors in series?
Replies
4
Views
2K
Determine the force with which the magnetic field of a coil acts on an infinitesimal cube of iron
Replies
6
Views
964
Electric Field Inside Cylindrical Capacitor
Replies
2
Views
2K
Determining Inductance L in an LC Circuit
Replies
5
Views
2K
Making sense of sequence of ideas in MIT OCW's 8.02 notes on Faraday
Replies
1
Views
1K
Magnetization of a paramagnetic sphere
Replies
11
Views
2K
Modelling a metal detector using eddy currents from Non-Destructive Testing
Replies
1
Views
909
Two different dielectrics between parallel-plate capacitor
Replies
6
Views
2K
Does a linearly time varying B create changing E?
Replies
4
Views
2K

Hot Threads

Recent Insights

Back
Top