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 motor has coils with a resistance of 30. Ω and operates froma voltage of 240 V. When the motor is operating at its maximumspeed, the back emf is 145 V. Find the current in thecoils (a) when the motor is first turned on and (b) when themotor has reached maximum speed. (c) If the current in themotor is 6.0 A at some instant, what is the back emf at thattime?
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-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?
Essential University Physics: Volume 1 (3rd Edition)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.
What is Electromagnetic Induction? | Faraday's Laws and Lenz Law | iKen | iKen Edu | iKen App; Author: Iken Edu;https://www.youtube.com/watch?v=3HyORmBip-w;License: Standard YouTube License, CC-BY