Transcript Transformers
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Transformers
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Parts of a transformer
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Using a transformer to change voltage
The voltage induced in the secondary (output) coil depends on the number of turns on the primary and secondary coils. A
step-up transformer
has more turns on the secondary coil and so
increases voltage
.
3 of 6 A
step-down transformer
has fewer turns on the secondary coil and so
decreases voltage
.
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Investigating transformers
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Properties of transformers
Transformers transfer power between circuits. The design of a transformer determines the characteristics of the electricity flowing in its secondary circuit. The
frequency
of the alternating current in the secondary circuit matches the primary circuit, but what about voltage?
The voltage in each circuit is related to the
number of coils
on each side of a transformer by the following formula:
primary voltage secondary voltage = primary turns secondary turns
V
p
V
s =
N
p
N
s
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Calculating voltage
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