INDUCTANCE
DC Circuits
Inductors in parallel are combined like resistors in
Figure 5 Inductors in Parallel
parallel as given by Equation (3-3).
(3-3)
1
Leq
1
L1
1
L2
. . .
1
LN
When only two inductors are in parallel, as
shown in Figure 5, Equation (3-3) may be
simplified as given in Equation (3-4). As shown
in Equation (3-4), this is valid when there are
only two inductors in parallel.
(3-4)
1
Leq
L1
L2
L1
L2
Inductors will store energy in the form of a magnetic field. Circuits containing inductors will
behave differently from a simple resistance circuit. In circuits with elements that store energy,
it is common for current and voltage to exhibit exponential increase and decay (Figure 6).
Figure 6 DC Current Through an Inductor
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