the problem reads... the magnetic field inside a superconducting solenoid is 4.50T. the solenoid has an inner diammeter of 6.20cm and length 26.0cm.(adsbygoogle = window.adsbygoogle || []).push({});

Determine (a) the magnetic energy density in the field. (b) he enrgy stored in the magnetic field with in the solenoid.

For (a) i use the formula Ub= (B^2)/(2Uo) and i get 8.1x10^6

Is this correct?

For (b) im not quite sure what to do. I know i must use the length and diameter to find B. or maybe not

I need some guidance.

Thank You

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# Homework Help: Energy in a magnetic field

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