Electrician Red Seal · Question
A single-phase, 240 V, 60 Hz resistive heater draws 10 A of current. What is its power factor?
A purely resistive heater does not consume or produce reactive power; all the power it draws is active power. Therefore, the phase angle between voltage and cur
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Question: A single-phase, 240 V, 60 Hz resistive heater draws 10 A of current. What is its power factor?
Answer options:
- 0 (leading)
- 0.5 (lagging)
- 0.8 (lagging) ✅ 1.0 (unity)
Correct answer: 1.0 (unity)
Explanation: A purely resistive heater does not consume or produce reactive power; all the power it draws is active power. Therefore, the phase angle between voltage and current is zero, resulting in a power factor of 1.0 (unity).
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- A residential garage is to be wired with a 15 A, 120 V duplex receptacle. According to the Canadian Electrical
- During a renovation of a commercial kitchen, an electrician needs to replace an old single-phase, 240 V, 5 kW
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