Electricity and Magnetism · Problem 7.17

ALTERNATING-CURRENT CIRCUITS — Edward Purcell & David Morin

Physics — E&M · magnetic-energy-two-expressions

Problem

Two expressions for the energy * Two different expressions for the energy stored in a long solenoid are

LI^2/2

and

(B^2/2\mu_0)(\text{volume})

. Show that these expressions are consistent.