Solved: The magnetic field B at the center of a circular
Chapter 15, Problem 80GP(choose chapter or problem)
The magnetic field at the center of a circular coil of wire carrying a current
(as in Fig.
) is
\(B=\frac{\mu_{0} N I}{2 r}\)
where is the number of loops in the coil and
is its radius. Suppose that an electromagnet uses a coil
in diameter made from square copper wire
on a side. The power supply produces
at a maximum power output of
.
How many turns are needed to run the power supply at maximum power?
(b) What is the magnetic field strength at the center of the coil?
(c) If you use a greater number of turns and this same power supply (so the voltage remains at ), will a greater magnetic field strength result? Explain.
Equation Transcription:
Text Transcription:
B=\frac{\mu_0 N I 2 r
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