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A 220 V DC shunt motor draws a current of 20 A and rotates at a speed of 1783 r.p.m. The armature winding resistance is 0.2 Ω and the field winding resistance is 440 Ω. Rotational losses are 180 W. The torque developed by the motor is:  The torque delivered by the motor to the load coupled to its shaft is:  The efficiency of the motor under these operating conditions is

A 220 V DC shunt motor draws a current of 20 A and rotates at a speed of 1783 r.p.m. The armature winding resistance is 0.2 Ω and the field winding resistance is 440 Ω. Rotational losses are 180 W. The torque developed by the motor is:  The torque delivered by the motor to the load coupled to its shaft is:  The efficiency of the motor under these operating conditions is

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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A 220 V DC shunt motor draws a current of 20 A and rotates at a speed of 1783 r.p.m. The armature winding resistance is 0.2 Ω and the field winding resistance is 440 Ω. Rotational losses are 180 W.

The torque developed by the motor is:

 The torque delivered by the motor to the load coupled to its shaft is:

 The efficiency of the motor under these operating conditions is:

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