1. A 220V d.c. shunt motor has a 5V brush drop, an armature resistance of 0.20, and a rated armature current of 40A. Calculate: (a) the counter-back e.m.f. (EC), (b) power developed by the armature (Pd) in watts (c) mechanical power developed by the armature in horsepower. Ans.[207V, 8280 W, 11.099hp]

Delmar's Standard Textbook Of Electricity
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ISBN:9781337900348
Author:Stephen L. Herman
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Chapter5: Resistors
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1. A 220V d.c. shunt motor has a 5V brush drop, an armature resistance of 0.20, and a rated armature
current of 40A. Calculate:
(a) the counter-back e.m.f. (EC),
(b) power developed by the armature (Pd) in watts
(c) mechanical power developed by the armature in horsepower.
Ans.[207V, 8280 W, 11.099hp]
Transcribed Image Text:1. A 220V d.c. shunt motor has a 5V brush drop, an armature resistance of 0.20, and a rated armature current of 40A. Calculate: (a) the counter-back e.m.f. (EC), (b) power developed by the armature (Pd) in watts (c) mechanical power developed by the armature in horsepower. Ans.[207V, 8280 W, 11.099hp]
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