SOLUTIONS:
22. mutual inductance
23. a.
b.
24.
a & d.
25.
CONTINUED.
In order to have mutual inductance, there must be a changing magnetic field. An a-c voltage produces a
constantly changing magnetic field.
Q. Under what conditions can a d-c voltage produce a changing magnetic field?
26.
Transformers are coils that transfer a-c energy from one winding to the other winding by mutual inductance.
The mutual inductance between two coils is determined by two factors:
(1) The inductance of the coils in henrys, and
(2) The coefficient of coupling between the two coils.
IT0353
1-14
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