Author Topic: Quick Question (Read 550 times) Tweet Share

happygolucky11 · « **on:** August 06, 2012, 06:49:37 pm »

Hi!

I'm just wondering, does the speed of a magnet which is entering a solenoid, affect the size of the EMF generated?

Thanks

xZero · « **Reply #1 on:** August 06, 2012, 10:04:23 pm »

Yes, higher velocity -> higher change in magnetic flux -> higher EMF generated

panicatthelunchbar · « **Reply #2 on:** August 07, 2012, 04:47:59 pm »

Another question, if someone can help with.

Do we use the RMS or peak voltage when solving questions? How do we know which one to use?

paulsterio · « **Reply #3 on:** August 07, 2012, 08:40:44 pm »

Another question, if someone can help with.

Do we use the RMS or peak voltage when solving questions? How do we know which one to use?

Generally RMS, but it depends on the question - you rarely use peak voltages

I'm just wondering, does the speed of a magnet which is entering a solenoid, affect the size of the EMF generated?

$EMF=\frac{\Delta \Phi}{\Delta t}$

The faster it moves through, the lesser the time, the greater the EMF.

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