Figure 5
Magnetic field resulting from (a) a current loop, (b) a solenoid, and (c) a toroid.
a)
The field at the center of a single loop is given by
, where r
is the radius of the loop.
b)
The field due to a solenoid is given by B = μ
0
NI, where N is the
number of turns per unit length.
c)
The field due to a toroid is given by
, where R is the radius
to the center of the toroid.
(Adopted from
www.cliffsnotes.com
)
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