A small permanent-magnet DC motor has an armature resistance of 3.5 2, and armature voltage of 7 V, the motor achieved a no-load speed of 11, 500 r/min while drawing an armature current of 15 mA. Determine the motor torque constant K (v/(rad/sec)). a) 4.21 mV/(rad/sec) b) 5.77 mV/(rad/sec) c) 5.23 mV/(rad/sec) d) 8 mV/(rad/sec)

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You are attempting question 1 out of 12
A small permanent-magnet DC motor has an armature resistance of 3.5 Q, and armature
voltage of 7 V, the motor achieved a no-load speed of 11, 500 r/min while drawing an
armature current of 15 mA. Determine the motor torque constant K (V/(rad/sec)]
a) 4.21mV/(rad/sec)
b) 5.77 mV/(rad/sec)
c) 5.23 mV/(rad/sec)
d) 8 mV/(rad/sec)
Answer
E Lorgene P. Gasal
top
A.
Transcribed Image Text:ect Test Note: - You are attempting question 1 out of 12 A small permanent-magnet DC motor has an armature resistance of 3.5 Q, and armature voltage of 7 V, the motor achieved a no-load speed of 11, 500 r/min while drawing an armature current of 15 mA. Determine the motor torque constant K (V/(rad/sec)] a) 4.21mV/(rad/sec) b) 5.77 mV/(rad/sec) c) 5.23 mV/(rad/sec) d) 8 mV/(rad/sec) Answer E Lorgene P. Gasal top A.
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