An AC adapter for a telephone answering machine uses a transformer to reduce the line voltage of 120 V to a voltage of 8.00 V. The RMS current delivered to the answering machine is 620 mA. If the primary (input) coil of the transformer has 480 turns, then how many turns are there on the secondary (output) coil? Submit Answer Tries 0/20 What is the power drawn from the electric outlet, if the transformer is assumed to be ideal? Submit Answer Tries 0/20 What is the power drawn by the transformer, if 13.5 percent of the input power is dissipated as heat in the coils and in the iron core of the transformer?

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An AC adapter for a telephone answering machine uses a transformer to reduce the line voltage of 120 V to a voltage of 8.00 V. The RMS current delivered to the answering machine is 620 mA. If the
primary (input) coil of the transformer has 480 turns, then how many turns are there on the secondary (output) coil?
Submit Answer Tries 0/20
What is the power drawn from the electric outlet, if the transformer is assumed to be ideal?
Tries 0/20
What is the power drawn by the transformer, if 13.5 percent of the input power is dissipated as heat in the coils and in the iron core of the transformer?
Submit Answer
Transcribed Image Text:An AC adapter for a telephone answering machine uses a transformer to reduce the line voltage of 120 V to a voltage of 8.00 V. The RMS current delivered to the answering machine is 620 mA. If the primary (input) coil of the transformer has 480 turns, then how many turns are there on the secondary (output) coil? Submit Answer Tries 0/20 What is the power drawn from the electric outlet, if the transformer is assumed to be ideal? Tries 0/20 What is the power drawn by the transformer, if 13.5 percent of the input power is dissipated as heat in the coils and in the iron core of the transformer? Submit Answer
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