Electromagnetic Induction

[sumit]

Since motion in a magnetic field by a conductor produces electrical charge in the conductor, does the strength of magnetic field degrade over time if we keep the conductor in motion? IF no then does anything degrade or lose energy over time in this scenario other than the fact that I lose energy in moving the conductor.

[studiot]

The energy in the system comes from the mechanical work moving the conductor.

 

Don't forget that it is not any old movement in a magnetic field that counts it is movement perpendicular to the field. Movement parallel to the field has no effect.

Edited July 6, 2012 by studiot

[sumit]

The energy in the system comes form the mechanical work moving the conductor.

 

Don't forget that it is not any old movement in a magnetic field that counts it is movement perpendicular to the field. Movement parallel to the field has no effect.

 

 

 

yeah thanks!

[sumit]

Alright. So is it possible to rotate the conductor perpendicular to the magnetic field first(mechanically), store the charge in a capacitor and then use the stored charge to move the conductor again and keep doing this on and on.

 

 

 

 

PS- when the conductor is moved again the second time using the stored charge in the capacitor , no mechanical energy is used. Only the energy of the charge stored in the previous rotation(which was mechanical).

[Joatmon]

Alright. So is it possible to rotate the conductor perpendicular to the magnetic field first(mechanically), store the charge in a capacitor and then use the stored charge to move the conductor again and keep doing this on and on.

 

 

 

 

PS- when the conductor is moved again the second time using the stored charge in the capacitor , no mechanical energy is used. Only the energy of the charge stored in the previous rotation(which was mechanical).

Sorry, You cannot do this because of losses such as friction in any bearings and heat in the coil. These losses ensure that the electrical energy stored in the capacitor will be insufficient to maintain rotation of the coil. Your device will spin down. Like many others you have not invented a perpetual motion machine!

Edited July 7, 2012 by Joatmon