A dc motor with its rotor and field coils connected in series has an internal resistance of 3.2

Name: A dc motor with its rotor and field coils connected in series has an internal resistance of 3.2 Ω . When the motor is running at full load on a 120 V line, the emf in the rotor is 105 V. (a) What is the current drawn by the motor from the line? (b) What is the power delivered to the motor? (c) What is the mechanical power developed by the motor?
Uploaded: 2023-01-17T22:18:39-08:00
Duration: 1 min 18 s
Channel: Timothy James
Description: A dc motor with its rotor and field coils connected in series has an internal resistance of 3.2 Ω . When the motor is running at full load on a 120 V line, the emf in the rotor is 105 V. (a) What is the current drawn by the motor from the line? (b) What is the power delivered to the motor? (c) What is the mechanical power developed by the motor?

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Timothy James · Accepted Answer

(a) The current drawn by the motor from the line is $3.2 Omega times 120 mathrm{~V} = 480 Omega

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