Compare the total magnetic energy in two solenoids, each with N turns, area A, and current I, but length x and 2x. Denote Ux the total magnetic energy in the solenoid with length x, and U2x the one in the solenoid with length 2x. What is U2x/Ux?
a and d please
i got it, is the negative :)
C) i3 please, i3 isnt same to i2
i need only the c1
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