A 120 V (rms) power line is connected to the primary of a step-down transformer, with a turn ratio of 12: 1
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A 120 V (rms) power line is connected to the primary of a step-down transformer, with a turn ratio of 12: 1

[From: ] [author: ] [Date: 12-04-25] [Hit: ]
330 W of electric power for its operation. What is the peak instantaneous current in the primary?-The secondary current is Is=9.33/10=.933 amps.If you neglect the magnetizing current,......
A 120 V (rms) power line is connected to the primary of a step-down transformer, with a turn ratio of 12: 1. The transformer's secondary is connected to a doorbell, which requires 9.330 W of electric power for its operation. What is the peak instantaneous current in the primary?

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The secondary current is Is=9.33/10=.933 amps. If you neglect the magnetizing current, the primary current will be Is/12=.0777 amps. The peak value will be sqrt(2)*.0777.
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