A Transformer with 115V primary voltage and a ratio of 5:1 is supplying a landing light (load 24V 45 amps) is used, what is the current drawn?
- 205 amps.
- 5 amps.
- 9 amps.
Explanation
Ignoring losses, the input power equals the output power. The load draws 24 V x 45 A = 1080 W, so the primary current is 1080 W divided by the 115 V primary, which is about 9.4 A, rounded to 9 amps. The 5:1 turns ratio is a step-down, so the primary current is far smaller than the secondary current.
Jordi asking:
why please
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