In a pure resistive circuit__________?
Correct answer: D. current is in phase with the voltage
- A. current lags behind the voltage by 90°
- B. current leads the voltage by 90°
- C. current can lead or lag the voltage by 90°
- D. current is in phase with the voltage
Explanation
Ohm's law gives i = v/R for a pure resistor, so voltage and current reach their peaks and zero crossings together. A 90° phase difference belongs to ideal inductive or capacitive circuits, not resistance.
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