Why does the power outlet provides alternating and not a direct current? What is the benefit...
Why does the power outlet provides alternating and not a direct current? What is the benefit of AC as compared to DC? Why is AC to DC conversion necessary?
Homework Answers
Alternating current involves lower transmission loss as compared to DC. In AC , transmission takes place at high Voltage and low current . the low current value results in smaller loss as losses are proportional to square of the current.
In case of the DC , the transmission takes place at lower voltage and high current. the high current value results in greater loss as losses are proportional to square of the current.
also for the conversion of Voltage , DC involves inefficient and complex converter whereas the same thing was easier to perform using efficient and inexpensive transformers in AC. AC to DC conversion is necessary because some of the appliances only work at DC
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Why does the power outlet provides alternating and not a direct
current? What is the benefit...
Please help. Thanks Imagine a world where alternating current (AC) electric power systems were not discovered...
Please help. Thanks
Imagine a world where alternating current (AC) electric power systems were not discovered at all. Using concepts of electric power systems, speculate how would a world running on direct current (DC) electric power systems look like in contrast to an AC powered world (explain these differences in aspects of the science as well as the society).
Question 12 The electricity from a household outlet can be dangerous because It uses alternating current...
Question 12 The electricity from a household outlet can be dangerous because It uses alternating current 120 Volts can be stronger than nerve signals O It can source enough current to cause harm O It uses direct current Question 13 A cell phone wrapped in metal foil is observed to not be able to get a signal and ring when ca Which concept that best explains why this happens?
Question 12 The electricity from a household outlet can be dangerous because It uses alternating current...
Question 12 The electricity from a household outlet can be dangerous because It uses alternating current 120 Volts can be stronger than nerve signals It can source enough current to cause harm O It uses direct current
Am I correct in thinking that AC (alternating current) is induced from a magnetic field and...
Am I correct in thinking that AC (alternating current) is induced from a magnetic field and DC (direct current) is produced in an electric field? If no, please explain the origins and difference between the two. Thanks
1. Write an equation that describes voltage supplied by a wall outlet. (f = 60 Hz,...
1. Write an equation that describes voltage supplied by
a wall outlet.
(f = 60 Hz, Vrms = 120 V)
2. What is the instantaneous voltage of a sine wave at
half of a period?
Describe Alternating Current (AC). Explain how resistors, capacitors, and inductors behave in an AC circuit. WRITEUP REQUIREMENTS Informal: Questions - 6 pts, Data Tables - 3 pts, Survey Questions from Syllabus - 1 pt INTRODUCTION V Up to this point, we have been using supply...
Question 2- An alternating current power supply is connected as shown in the figure to a...
Question 2- An alternating current power supply is connected as shown in the figure to a resistor, a capacitor, and an inductor. The power supply provides a voltage given by ε(t)-fo . cos(ωt). a) Make a phasor diagram and draw the voltage and current phasors for the resistor, capacitor, and inductor. (Be sure the phase relations between each phasor is clear, and be sure to label all phasors.) b) Use your diagram to find an equation for lo (the amplitude...
A 10 ohm resistor is connected to a 120v AC alternating current source. What is the...
A 10 ohm resistor is connected to a 120v AC alternating current source. What is the power in kW dissipated in the resistor? a. 0.10 b. 0.14 c. 0.20 d. 0.29
Book name # fundamental of electric machines A brushless DC electric motor (BLDC motor or BL...
Book name # fundamental of electric
machines
A brushless DC electric motor (BLDC motor or BL motor), also known as electronically commutated motor (ECM or EC motor) and synchronous DC motors, are synchronous motors powered by direct current (DC) electricity via an inverter or switching power supply which produces electricity in the form of alternating current (AC) to drive each phase of the motor via a closed loop controller. The controller provides pulses of current to the motor windings that...
1. Is the power supply for a transformer AC or DC? Explain in detail why only...
1. Is the power supply for a transformer AC or DC? Explain in detail why only this type of power supply will work. 2. Some configurations with the iron core have low efficiency while others have high efficiency. What is the iron core doing to cause this? Be specific. (Hint: think about how a transformer works.) 3. For an ideal transformer the energy must be conserved, so the average power (P=IV) in the two circuits must be equal. Therefore, if...
Please help me answer these question about Electromagnetism 1. When is a magnetic field not acting...
Please help me answer these question about Electromagnetism 1. When is a magnetic field not acting on a moving charge? 2. When does a magnetic field produce electric current in a closed circuit? 3. Explain why a transformer works only in alternating current, AC not direct current DC.
Please help. Thanks
Imagine a world where alternating current (AC) electric power systems were not discovered at all. Using concepts of electric power systems, speculate how would a world running on direct current (DC) electric power systems look like in contrast to an AC powered world (explain these differences in aspects of the science as well as the society).
Question 12 The electricity from a household outlet can be dangerous because It uses alternating current 120 Volts can be stronger than nerve signals O It can source enough current to cause harm O It uses direct current Question 13 A cell phone wrapped in metal foil is observed to not be able to get a signal and ring when ca Which concept that best explains why this happens?
Question 12 The electricity from a household outlet can be dangerous because It uses alternating current 120 Volts can be stronger than nerve signals It can source enough current to cause harm O It uses direct current
1. Write an equation that describes voltage supplied by
a wall outlet.
(f = 60 Hz, Vrms = 120 V)
2. What is the instantaneous voltage of a sine wave at
half of a period?
Describe Alternating Current (AC). Explain how resistors, capacitors, and inductors behave in an AC circuit. WRITEUP REQUIREMENTS Informal: Questions - 6 pts, Data Tables - 3 pts, Survey Questions from Syllabus - 1 pt INTRODUCTION V Up to this point, we have been using supply...
Question 2- An alternating current power supply is connected as shown in the figure to a resistor, a capacitor, and an inductor. The power supply provides a voltage given by ε(t)-fo . cos(ωt). a) Make a phasor diagram and draw the voltage and current phasors for the resistor, capacitor, and inductor. (Be sure the phase relations between each phasor is clear, and be sure to label all phasors.) b) Use your diagram to find an equation for lo (the amplitude...
Book name # fundamental of electric
machines
A brushless DC electric motor (BLDC motor or BL motor), also known as electronically commutated motor (ECM or EC motor) and synchronous DC motors, are synchronous motors powered by direct current (DC) electricity via an inverter or switching power supply which produces electricity in the form of alternating current (AC) to drive each phase of the motor via a closed loop controller. The controller provides pulses of current to the motor windings that...
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