You have a Solenoid with a 2.8mm radius. The copper wires making up this solenoid have a resistance of 8.6 ohms, what is the magnetic field within the solenoid?

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anonymous · Answer

can u try to answer the final part of the home work its under your question pls

anonymous · Answer

Is there some sort of current involved in this question? A magnetic field is only formed when there is moving charge present. If there is no current running through the wire (regardless of whether it has resistance or not), then  your answer should be zero. 

If they give you a voltage difference across the ends of the solenoid you could use that and the given resistance to calculate the current. 

Hope this helps, let me know if you need clarification.

anonymous · Answer

Ah, my bad, there is 1V potential, so I suppose that works out to a current of 116 mA. This isn't so much a question from a textbook as it is practical application.

anonymous · Answer

The numer of of full raps around the the silonoid with copper wire * the current  I through  the wire * the premeability constant + (-) resitstance$$B=\mu _{o} NI$$

anonymous · Answer

V/R=I