Hi! I have two motors (pennwood numechron) for desktop clock. Wattage indicated as 3,7 W. But when connect ammeter is obtained 50mA, which corresponds to 55W. Why so? Thanks!
...because 120V x 50mA gives 6W, no 55W ...because with inductive loads there is a phase shift between AC voltage and current, and then V x A is different from Watt. ...because a running motor generates his EMF voltage which is subtracted from his supply voltage. Regards, Frank
