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What does dB equals to?
dB (decibel) is a logarithmic measure of the ratio of two power values, for example, two signal strengths. This is often used for power gain or power loss. For example, a loss of 10 dB means that the signal degrades by a factor of 10, a loss of 20 dB means that the signal degrades by a factor of 100, and a loss of 30 dB means that the signal degrades by a factor of 1000.
What Equation is used to determine power loss?
Power (Joules) = the square root of the voltage squared divided by the resistance
Why the corrosion rate expressed in penetration rate is more useful than that expressed in the rate of metal loss per unit area?
In most cases you'd be concerned with loss of strength of an item due to reduction in thickness or in cross section area rather than with how much metal you've lost (weightwise) from the whole of the item surface. It is easy to convert from one to the other though. The imperial unit of mpy (mils per year) equates to a penetration rate of about ten atom spacings per hour :)
How do you find the loss factor in hysteretic damping?
Loss factor is best obtained by dynamically loading (extensional, torsional etc.) a specimen of the material and plotting the hysteresis curve in stress-vs strain plane. If the total area under the hysteresis loop is D, the loss factor is computed from the following formula Loss factor=D/(2*pi*max stress* max strain) For lightly damped materials, loss factor is just twice the daming factor 'zeta' which obtained either by log-decrement method or half-power bandwidth method. Loss factor is best obtained by dynamically loading (extensional, torsional etc.) a specimen of the material and plotting the hysteresis curve in stress-vs strain plane. If the total area under the hysteresis loop is D, the loss factor is computed from the following formula Loss factor=D/(2*pi*max stress* max strain) For lightly damped materials, loss factor is just twice the daming factor 'zeta' which obtained either by log-decrement method or half-power bandwidth method.
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'.
What is skin effect in power system?
DEFINITION: Nonuniform density of current due to its characteristic to flow more at the surface of the conductor than that of the other section of the conductor called Skin Effect in power system.EFFECT: Due to the skin effect, whole section of the conductor can not be utilized properly. Moreover, skin effect causes increment in effective resistance of the conductor and in power loss.
What is the power loss in watts of a conductor that carries 24Ampere and has voltage drop of 7.2Volts?
Power = voltage times current 7.2 volts * 24 amperes = 172.8 watts
What is the power loss In a conductor for a 120 v circuit that has a 3 percent voltage drop and carries a flow of 22 Amps?
2640
Why transformer power expressed in KVA?
because of its losses i.e iron and copper losses. since iron loss depends on voltage (v)and copper loss depends on current(i).
What is conductor loss?
Conductor loss refers to the energy dissipated as heat in a material due to the flow of electric current. It is caused by the resistance of the conductor and is proportional to the square of the current flowing through it. This loss results in decreased efficiency in electrical systems and can lead to overheating if not properly managed.
Corona loss is less when the shape of the conductor is?
Circular
How Hollow conductor is used to reduce corona loss how does it reduce the loss?
to have large diameter without increasing its weight.
Resistance to the flow of electrons in a conductor causes a loss of?
Energy as heat
Why no power loss in pure inductance?
An inductor is a device which stores energy as a magnetic energy.... Ideal inductor have no resistance.....so there is no power loss.... power loss = (I*I)*R
Can cat5 cable be used FOR SPEAKER WIRING?
No. The conductor size is way too small. The loss of power to the speaker would be huge, and a decent-sized amp could easily overheat the wires. Bad idea.
What is the power loss in dB?
Power loss in dB is a measure of how much power is lost in a signal as it travels through a medium or a system. It is calculated using the formula: Power loss (dB) = 10*log10(P1/P2), where P1 is the initial power and P2 is the final power. The higher the power loss in dB, the more power is lost in the signal.
Is thinsulate a conductor?
No, Thinsulate is not a conductor. Thinsulate is a type of synthetic thermal insulation material that is designed to trap heat and keep the body warm by minimizing heat loss.
