Multiple choice

The circuit element where the impressed voltage is always in phase with the resulting current is?

  1. An ideal resistor

  2. An ideal capacitor

  3. An ideal coil

  4. An ideal transformer
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A Correct answer
Explanation

In an ideal resistor, voltage and current are always in phase because resistors follow Ohm's Law (V = IR) without any phase shift. In an ideal capacitor, current leads voltage by 90 degrees. In an ideal coil (inductor), voltage leads current by 90 degrees. An ideal transformer has phase relationships between its primary and secondary windings.

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