A 120-V, series-wound motor has a field resistance of 80 Ω and an armature resistance of 10 Ω . When it is operating at full speed, a back emf of 75 V is generated, (a) What is the initial current drawn by the motor? When the motor is operating at full speed, where are (b) the current drawn by the motor, (c) the power output of the source, [ d) the power output of the motor, and (e) the power dissipated in the two resistances?
A 120-V, series-wound motor has a field resistance of 80 Ω and an armature resistance of 10 Ω . When it is operating at full speed, a back emf of 75 V is generated, (a) What is the initial current drawn by the motor? When the motor is operating at full speed, where are (b) the current drawn by the motor, (c) the power output of the source, [ d) the power output of the motor, and (e) the power dissipated in the two resistances?
A 120-V, series-wound motor has a field resistance of
80
Ω
and an armature resistance of
10
Ω
. When it is operating at full speed, a back emf of 75 V is generated, (a) What is the initial current drawn by the motor? When the motor is operating at full speed, where are (b) the current drawn by the motor, (c) the power output of the source, [ d) the power output of the motor, and (e) the power dissipated in the two resistances?
A 120-V, series-wound motor has a field resistance of 80 Ω and an armature resistance of 10 Ω . When it is operating at full speed, a back emf of 75 V is generated. (a) What is the initial current drawn by the motor? When the motor is operating at full speed, where are (b) the current drawn by the motor, (c) the power output of the source, (d) the power output of the motor, and (e) the power dissipated in the two resistances?
A DC motor has a rotor and field coils connected in series with a resistance of 3.2 Ω. When it spins at full load on a 120 V line, the emf rotor is equal to 105 V. (a) What is the current that the motor receives from the line? (b) What is the power required for the engine? (c) What is the mechanical power developed by the engine?
A 120.0-V motor draws a current of 5.92 A when running at normal speed. The resistance of the armature wire is 0.629 a. (a)
Determine the back emf generated by the motor. (b) What is the current at the instant when the motor is just turned on and has not
begun to rotate? (c) What series resistance must be added to limit the starting current to 15.0 A?
(a) Number
i
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(b) Number
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(c) Number
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