You have a 1.5 m long copper wire. You want to make an N-turn current loop...
You have a 1.5 m long copper wire. You want to make an N-turn current loop that generates a 2.3 mT magnetic field at the center when the current is 2.4 A . You must use the entire wire.
What will be the diameter of your coil?
Homework Answers
B = uoNI/D
where N = number of turns
Length = pi*D*N
N = 1.5 / pi*D
2.3*10^-3 = 4pi*10^-7*1.5*2.4 / pi*D^2
D = 0.044 m
diameter of the coil is 4.4 cm
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