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A generator produces 240volts at 25 amperes. If the mechanical and electrical power losses total 900 watts what is the efficiency of the generator?
Koolbrez21
Efficiency is measured as the ratio of power output to power input. In this case the power input of the generator is 240V * 25A = 6000 VA however the stated losses are 900 W so the power output is 6000 - 900 = 5100W. Then the efficiency would be 5100/6000 = 0.85 or 85% efficient.
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What is the impedance of a single phase inductive circuit having a voltage of 240volts and a current flow of 10amps?
Work it out for yourself. The equation is: Z = E/I, where Z is the impedance, E is the supply voltage, and I is the load current.
Is 240vac equals 240volts?
Not exactly ! 240 V ac is the RMS voltage of the ac sine wave the power company delivers to the consumer . RMS ? sine wave ? never mind the mathmatical definitions ; it's the dc (thats direct or steady current) equivalent of the ac delivered to the consumer . The peak value of the ac voltage on your power point is about 340 volts + and - . The foregoing figures are for european mains , scale proportionately for 110 V .
A relay is an electrical device that?
A relay is a device that takes a smaller source of electrical power and using it to manually control a larger source of electrical power. Typically, a low voltage or low current source, which is more easily manageable with control circuits, sends a signal to energize an electromagnetic coil. When the coil is activated, the magnetic field moves a plunger type device which has contacts that serve as a switch for the larger voltage or current device. In essence, the contacts complete the path for the circuit and allows a load to begin to operate using the higher voltage or current that is supplied through the contacts' connections. A good example is a house air conditioning system's condenser unit (the part which contains the compressor and sits outside of the house). The condenser requires 240 Volts Alternating Current (AC). But the thermostat inside the house uses a 24 Volt power source. When it's time to cool the house down, the thermostat on the wall sends 24 Volt signal to the relay in the condenser unit. The 24 volts causes the coil to energize and makes an electrical connection to the 240volts required to power the compressor. The compressor now runs and your house begans to cool off. Once the set temperature is reached, the thermostat discontinues the 24 volt control signal and the 240 Volts is disconnected from the compressor by the relay, thus shutting off the condesor unit. In cars and vehicles, a relay performs the same function, except that the voltage is not 240 Volts AC. It is 12 volts Direct Current (12VDC). It is used in the air conditioning system in much the same way, but is also used to control the blinking of turn signals, the horn, and in some cases headlights. The voltage remains at 12VDC, but large current flow is controlled by small current flow. For example, 12VDC at 10milliamps through the relay could contol the headlights which may require 12VDC at 5 Amps to shine brightly enough to see at night.
How do you convert a 110-220 motor from 110 to 220?
volts? no, but you can convert 240volts to 110 volts, thus powering your drill properly. What that means is that, by using a power "Inverter'' you may Invert 240 to 110, thus not having to brake your head thinking about changing the motor of your drill. ( power converted)= fron 110 to 240 ( power inverter)= 240 to 110 I think I am right.
A generator produces 240volts at 25 amperes If the mechanical and electrical power losses total 900 watts what is the efficiency of the generator?
If the generator produces 240v at 25 amps, this amounts to 6000 watts, so if the losses are 900 watts, the total power generated must be 6900 watts. The efficiency is then 6000/6900 = 0.87, or 87 percent. You have not put in heat losses however, or are they included in 'mechanical? ****The previous answer above is incorrect. Read and understand the question first. The general rule of thumb when calculating power equations is to factor in power loss as an inclusive amount of the total power being generated. unless stated otherwise Therefore 240v at 25amps gives 6000watts power loss is 900watts The question says that the power the generator produces is 240v at 25amps which is not the useful power it delivers ( this is a very common mistake in learning and real life applications) and that is why we do not add power loss to the total power generated, rather we subtract power loss from the total power generated. Efficiency of the generator is actually the power the generator is delivering for useful work compared to the total power generated. In this case 6000 watts (Total power produced) - 900watts ( power loss) = 5100watts Therefore the geneator's efficiency is 5100/6000 x 100% = 85% For the last part of the previous answer, For a generator, mechanical movement is counter reacted by friction which produces heat and noise while resistance to electrical current flow and electomagnetic induction generate heat. Of course this is just a general description, it gets quite complicated in advanced level analysis where back e.m.f, magnetic resonance, physical construction (generator type) and purity of construction materials just to mension a few are involved. I'm only a simple physicist, but I feel the word 'produced' is ambiguous, and I took it to mean the same as 'delivered'. If I went out and bought a small generator, and the sales people said it was a 2 Kw generator, I would expect it to deliver 2 Kw, and not 85 percent of that figure. So I think you could take this either way. To use the word 'produced' is not ideal, better to use 'generated power' and 'output power'.
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Yes.
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The equation you are looking for is Amps = Watts/Volts. To change kW to watts, multiply kW x 1000.
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240Volts in the USA.
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No
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Check the back of the charger, if it says "100-240volts" than yes.
What wire should I use for 240volts 1000amps service in the input 30 ft?
1 d0nt kn0w but have fun
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Pwer is volts times amperes. 120 volts times 10 amperes = 1.2 KW
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