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Electrical Engineering

Electrical engineering is a field of engineering that deals with the study and application of electricity, electronics and electromagnetism.

23,056 Questions

Lead acid batteries short circuit current?

You would have infinite amperes if there was no resistance in the battery plates, the battery terminal posts and in the wires that are shorting the battery.

But there is always resistance in those things so - depending on the thickness and therefore the effective resistance of the wires that are shorting the battery - the short circuit current will be from a few amps to many hundreds of amps and, unless someone sees it and acts quickly to remove the cause of the short, that current will continue until the battery either explodes or just runs down very fast.

I've seen them go both ways, along with the shorting wires smoking and then glowing like an electric fire, and also I have seen molten globs of hot metal dripping off from carelessly misplaced tools such as heavy screwdrivers, particularly if made of aluminum, and such things as small wrenches.

What is the price of absorption chiller 91 kw?

this is a difficult question, it depend the style of your absorption, direct fire or hot water or steam, if you have these detail, you can email me frozenwonderland@hotmail.com

What is difference between electricity and electronics?

Electricity is like static and lightning and is produced when something as a negative charge (more -electrons than +protons)

Electronics are usually devices that are powered by electricity

Why break down occurs and getting zero insulation resistance when a megger test is performed under vacuum?

The reason why the break down occurs and getting zero insulation resistance when the Megger test is performed under vacuum is because there needs to be a full test voltage performed. Insulation resistance represents the ratio that is between the applied voltage and the leakage.

Why Scott connection is used to convert three phase to two phase why cant you take two lines from three phase circuit?

In a two-phase connection, the phases are displaced by 90 degrees. Two lines (not 'phases') of a three-phase system will provide a single-phase supply, not a two-phase supply.

Who created the motor?

Both Diesel and Gasoline Engines are basically German inventions.

The Diesel Engine was invented by Rudolf Diesel

The Gasoline engine by Nikolaus August Otto

:-)

How do you calculate electrical power?

Voltage x current. In a resistor for example it is the voltage drop across it that is relevant, it may be part of a circuit.

What are the steps for transforming into a werewolf?

Its in your blood, in everybody's blood. Everybody has blood of vamps, were's, shifters. Everything. I am serious. You just have to activate the gene. NO MORE LIES...>.> or some hunting may ensue.

Use second order differential equation to solve RCL series circuit?

we use charge stored in the capacitor as our variable (remember it one of the three variable). so the potential difference across the capacitor is --charge stored in the capacitor at that instance/capacitance of the capacitor. potential difference across resistor is --resistance* differential of charge with respect to time. potential difference across inductor is -- inductance*double difference of charge with respect to the time. If there is no voltage source attached with the network then sum of the total potential difference is equal to zero hence your solution.........L*d^2(q)/dt^2 + R*d(q)/dt + q/c =0

How can a relay be used to run a 9V electric motor?

A relay cannot be used to power a motor. It can be used to control the motor by wiring the motor circuit in series with the relay contacts.

What is meant by a primary coil and a secondary coil?

In a transformer, the primary coil is the coil that has voltage applied to it. The secondary coil is the coil that we take voltage from. Transformers are used to step up voltage, step down voltage, or simply to isolate circuits.

How do circuit breakers apply to expansion?

A circuit breaker works by tripping a switch when too much current passes through it. As you may know, the higher the flow of energy, given a fixed resistance, the more heat will be generated. Because of this property, the heating of a metal strip (usually made from 2 different types of metals, so that it bends) is the mechanism for circuit discontinuation in a circuit breaker.

Why interference not observed in thick film?

Suppose white light is incident from a extended source on a plane parallel thick film viewed in reflected system, then for any value of r, due to large thickness the values of u can be found to satisfy the condition of constructive interference for every colour in the spectrum of white light. The different coloured fringes will overlap to produce general illumination. Thus, a thick film will produce general illumination and no colour will be seen.

In a parallel circuit adding more bulbs will increase?

It will decrease the effective load resistance across the power supply terminals,

increase the total current through the load, and increase the total power required

to be supplied by the power supply.

Is zener diode an ideal current source?

A: An ideal current source can be defined as a short with immense current capabilities A zener has no such capabilities

Why are DC touch voltage limits higher than AC touch voltage limits?

this is because in dc is steady current......so when a DC supply says 220v it means max possible voltage is 220 V

but on the other hand the AC ratings are written in terms of RMS values so wen an AC supply says 220V ,then the max voltage actually is 220*1.414(i.e sq. root 2)= 311V approx....so u see AC limit has to be kept lower than DC

Why digital camera is an example of an close loop control system?

I dont know

hello i no nothing about this but i think the work because its made out of baterys and well its digital

Can you bury insulated outdoor wire run through PVC?

you could but the pipe might fill with rain water during a storm, but as long as it doesn't have any opening/cuts in the wire insulation it should be fine.