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Can current flow in a circuit without potential difference?

A current cannot exist without voltage but voltage can exist without current.Simple example is battery. A battery has votlage even though it is not connected elsewhere.


Why does the speedometer indication fluctuate with engine RPM's when the vehicle is parked or in motion on a 1991 Ram Diesel?

Have your votlage output on your alternator checked? Have your votlage output on your alternator checked?


What is unit transformer?

UniT transformer are step up transformer which is connected to generating house & step up voltage from 11/15kV votlage to 220/400kV voltage level as requirement or line design parameter. It is just like transformer but connected to unit of the generating house that's why we called it unit transformers.


Why do most of your warning lights fade in and out while the engine is running on your 86 300zx non- turbo?

It is an over charging votlage regulator in the alt. Rare problem.


What you suggest to icrease the voltage gain if you found that the total votlage gain is low?

if you like the voltage is same but current different because you are don't understand this type question


What is EMI filter?

An in line device used in filtering ac votlage out of transient or (electrical noise) before allowing the electrical current to enter an electronic board of certain designs.


What type of sensor would utilize 2 wires and how would it be tested with a dvom?

A VRS sensor and you can measure it with a DVOM on A/C Votlage by probing both wires and cranking the car.


What causes a low voltage light to come on in a 1987 Plymouth Voyager?

Low voltage light usually comes on because alternator output is low or none. Put a volt meter across battery terminals, with car off, voltage should be around 12.5 or so, now start car it should jump to 13.8-14+ volts. If voltage doesnt jump then the alternator or votlage regulator are likely bad.


What is the difference between capactive voltage transformer and potential transformer?

A capacitive voltage transformer (CVT) uses a (usually two) stacks of capacitors to reduce the votlage to a smaller internal potential transformer (PT). This makes them less expensive than an equivalent PT, but there can be a loss of accuracy.


What does accuracy of a DAC mean?

The accuracy of a Digital-to-Analog Converter (DAC) refers to how closely the output voltage or current matches the digital input code it receives. It is typically measured in terms of the percentage error between the actual output and the ideal output. Higher accuracy indicates that the DAC can faithfully reproduce the analog signal from the digital input without introducing significant errors or distortions. This is crucial in applications where precise analog signal reproduction is required, such as in audio equipment or instrumentation.


How is ohms law used in a sentence?

I'm not quite sure what context you mean. V=IR to explain this in words you would simply say the voltage (V) of a circuit would be equal to the current (I) multiplied by the resistance(R). a practical example could be, if the resistance in a circuit was 2 and the current was 12 what is the voltage? well using Ohms law we would simply do (2 * 12) the voltage would be 24. [note, i do not know if that would work in real life it's just a example using numbers] you can aslo rearrange V=IR to work out how to calculate current and resistance V=IR I = V/R. Current equals votlage divided by resistance R=V/I. Resistance equals voltage divided by current hope this helps


Why autotransformer can handle more power than conventional transformer?

Perhaps you're referring to the size of the core? Strictly speaking, a 30MVA autotransformer can handle the same amount of power as a conventional transformer. But an autotransformer will be smaller than an equivalent conventional transformer. The reason is an autotransformer essentially has one winding on a core, with one tap including the whole winding, and another tap including only part of the winding. In a conventional transformer, power is transferred from one winding to the other by induction. In an auto, some is by conduction, and some is by induction. Here's an example comparison: Say we have a 10MVA 100kV/50kV 3 winding auto transformer. There are two parts of the winding - the series winding (the section of winding between the 100kV connection and 50kV connection), and the common winding (the section of winding between the 50kV connection to the neutral). If powered at 10MVA (full load), there will be: 10M / (100k * sqrt(3)) = 57.7 Amps flowing into the primary, and 10M / (50k * sqrt(3)) = 115.5 amps flowing out of the secondary So, 57.7A flow into the primary, down through the series winding and out the secondary. At the same time 57.7A flow up from the neutral through the common winding and out the secondary, resulting in a total secondary current of (57.7 + 57.7) = 115.5 (sorry, rounding is making my math look wrong!). Thus, the series winding is handling a total of: (100k - 50k)* 57.7A*sqrt(3) = 5MVA, and the common winding is handling a total of: (50k - 0) *57.7A*sqrt(3) = 5MVA So the series and common windings only have to be made to handle 1/2 the total load(for this example - it is 1/2 because the primary / secondary voltage is 2/1). In a conventional transformer, each winding carries the full load (10MVA), because it operates on induction (no conduction). If the votlage ratio between primary and secondary is too high, there is no real net savings in size (and thus cost), so a conventional transformer is often used. The cutoff point is around 4.