hi my frinds,
could anyone help me or give me the answer of this question plzzz

A separately excited DC motor is shown in figure 5.0 below. It has R​

​

A=2.3Ω and VT = 240V. For an output power of 2.5hp, nm = 1050rpm and IA = 10.1A. The field current remains constant at all times.​

a) Find the:
i. Power developed,
ii. Torque developed,
iii. Power lost in R​

​

A, and
iv. The rotational losses

b) Assuming that the rotational power loss is proportional to speed, find the no-load speed of the motor.​

 

plz help me

 

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In accordance with the Homework Forum Use Rules, can you tell us what progress you've made so far?

sorry
i'll put my answer and i need ur help

 

i get this answer
for a)
Pdev=2189.377W
Tdev=19.911Nm
PRa=234.623W
Prot=324.377W