Answer: The magnetic field B at the center of a circular
Chapter 20, Problem 76GP(choose chapter or problem)
The magnetic field at the center of a circular coil of wire carrying a current
(as in Fig.
is
\(B=\frac{\mu_{0} N L}{2 r}\)
where is the number of loops in the coil and
is its radius. Imagine a simple model in which the Earth's magnetic field of about \(1 G\left(=1 \times 10^{-4} T\right)\) near the poles is produced by a single current loop around the equator. Roughly estimate the current this loop would carry.
Equation transcription:
Text transcription:
B=frac{\mu{0} N L}{2 r}
1 G(=1 times 10^{-4} T)
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