Question

Two identical d.c shunt machines were tested by Hopkinson's method, gave the following
data
Line voltage = 230V; Line current excluding both the field currents = 30A, moto armature
current = 230 A, field currents 5 A and 4 A
If the armature resistance of each machine (including brushes) is 0.025 ohmi, calculate
efficiency of both machines.​

Answer 1

Answer:

data

Line voltage = 230V; Line current excluding both the field currents = 30A, moto armature

current = 230 A, field currents 5 A and 4 A

If the armature resistance of each machine (including brushes) is 0.025 ohmi, calculate

efficiency of both machines.

Explanation:

data

Line voltage = 230V; Line current excluding both the field currents = 30A, moto armature

current = 230 A, field currents 5 A and 4 A

If the armature resistance of each machine (including brushes) is 0.025 ohmi, calculate

efficiency of both machines.