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A dc shunt motor connected to a 120-v line runs at a speed

A DC shunt motor connected to a 120-v line runs at a speed of 1200 rpm when the armature current is 18A. The armature resistance is .1 ohms. Assuming constant field flux, what is the speed when the armature is 50A?(Hint : Speed is directly porportional to counter emf.

a) 1167.5rpm

b) 1200rpm

c) 1263.35rpm

d) none of the above Need to see work and formulas to better understand

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Electrical Engineering: A dc shunt motor connected to a 120-v line runs at a speed

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