1. Is a wattmeter required to measure the real power delivered to a resistive load? __________ Explain.

EBK ELECTRICAL WIRING RESIDENTIAL
19th Edition
ISBN:9781337516549
Author:Simmons
Publisher:Simmons
Chapter19: Special-purpose Outlets-water Pump, Water Heater
Section19.2: Water Heater Branch Circuit
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1. Is a wattmeter required to measure the real power delivered to a resistive load? __________ Explain.

2. A wattmeter will indicate zero when the current lags (or leads) the voltage by 90°. Explain why this happens.

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