2. A series wound DC motor with its rotor and field coils connected in series has the followingproperties: The resistance of the field coils is 10.0 N, the resistance of the rotor coil is 5.00 Q. Thevoltage of the power supply that is running the motor is 200 V. The current drawn from the powersupply and supplied to the motor is 10.0 A. What is the mechanical power output of the motor (inwatts)?(A) 500 (B) 375 (C) 620 (D) 700 (E) 250 (F) 200

GivenR1=10 ΩR2=5 ΩV=200 VI=10 A

Answered: 2. A series wound DC motor with its…

2. A series wound DC motor with its rotor and field coils conr properties: The resistance of the field coils is 10.0 Q, the resi: toltago of the power sunnly that is running the motor is 200

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter23: Electromagnetic Induction, Ac Circuits, And Electrical Technologies

Section: Chapter Questions

Problem 47PE: (a) What is the voltage output of a transformer used for rechargeable flashlight batteries, if its...

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(a) What is the voltage output of a transformer used for rechargeable flashlight batteries, if its primary has 500 turns, its secondary 4 turns, and the input voltage is 120 V? (b) What input current is required to produce a 4.00 A output? (c) What is the power input?
At what angular velocity in rpm will the peak voltage of a generator be 480 V. if its 500-turn, 8.00 cm diameter coil rotates in a 0.250 T field?
Integrated Concepts Hydroelectric generators (see Figure 20.43) at Hoover Dam produce a maximum current of 8.00 103 A at 250 kV. (a) What is the power output? (b) The water that powers the generators enters and leaves the system at low speed (thus its kinetic energy does not change) but loses 160 m in altitude. How many cubic meters per second are needed, assuming 85.0% efficiency?
2. A series wound DC motor with its rotor and field coils connected in series has the following properties: The resistance of the field coils is 10.0 Q, the resistance of the rotor coil is 5.00 Q. The voltage of the power supply that is running the motor is 200 V. The current drawn from the power supply and supplied to the motor is 10.0 A. What is the mechanical power output of the motor (in watts)? (A) 500 (B) 375 (C) 620 (D) 700 (E) 250 (F) 200
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Suppose a large power plant generates electricity at 12.0 kV. Its old transformer once converted this voltage to 330 kV. The secondary coil of this transformer is being replaced so that its output can be 770 kV for more efficient cross-country transmission on upgraded transmission lines.1. If the overall power output is 1000.0 MW and line resistance is 2.00 Ω, what was the power loss, in watts, in the OLD power lines which left the plant? 2. If the overall power output is 1000.0 MW and line resistance is 2.00 Ω, what is the power loss, in watts, in the NEW power lines which leave the plant?
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1. It is the measure of the ability of a material to maintain and establish a magnetic field. 2. Occurs when a change in current in one conductor induces a voltage in a itself. 3. For ideal transformers, the primary power is equal to the _______________ power 4. According to Faraday's Law Electromagnetic Induction: the induced EMF in the coil of wire is due to any changes in the _________________ environment around said coil 5. True or False? A step down transformer is needed when you want the current in the primary to increase at the secondary.
Suppose a large power plant generates electricity at 12.0 kV. Its old transformer once converted this voltage to 330 kV. The secondary coil of this transformer is being replaced so that its output can be 770 kV for more efficient cross-country transmission on upgraded transmission lines. 1. If the overall power output is 1000.0 MW and line resistance is 2.00 Ω, what was the power loss, in watts, in the old power lines which left the plant? 2. If the overall power output is 1000.0 MW and line resistance is 2.00 Ω, what was the power loss, in watts, in the new power lines which left the plant?
The charger for a cell phone contains a transformer that reduces 120-V (or 240-V) ac to 5.0. Vac to charge the 3.7-V battery. (It also contains diodes to change the 5.0-Vac to 5.0-Vdc.) Suppose the secondary coil contains 30 turns and the charger supplies 700mA. Calculate: A. The number of turns in the primary coil. B. The current in the primary coil. C. The power transformed.
1. The following test data are obtained from a 1/4 hp, 1o, 120V, 60HZ, 1730rpm induction motor. Stator winding (main) resistance = 2.9 ohms Blocked rotor test: V =43 V, I=5A, P=140W No-load test: V =120 V, I=3.5A, P=125W a) Obtain the double revolving field equivalent circuit for the motor. b) Determine the rotational loss. 2. For the single-phase induction motor of problem 1, determine the input current, power, power factor, developed torque, output power, efficiency of the motor, air gap power, and rotor copper loss if the motor is running at the rated speed when connected to a 120 V supply.