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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

What is meant by earthing?

The same as 'grounding' , putting a wire or metal stake into the ground so something attached to it has the same electrical potential

Is a capacitor sensitive to frequency?

yes, capacitive reactance is inversely proportional to frequency.

Change polarity in single phase 115 volt?

Most technical people believe that AC electricity is not polarized this is an incorrect assumption. Since AC power is just a potential difference between some reference (ground) and a signal it stands to reason reversing the Neutral and the "Hot" should reverse the polarity.

What is the behavior of current and voltage in a series cricuit?

Kirchhoff's Current Law: The sum of the signed currents entering a node is zero. A consequence of this is that, in a series circuit every node only has two connections, one entering and one leaving, thus, in a series circuit, the current is the same at every point.

Kirchhoff's Voltage Law: The sum of the signed voltage rises going around a series circuit is zero. This means, for example, that if you have two voltage drops, such as two bulbs in series with a battery, the voltage drops across them will add up to the voltage across the battery.

Can you find part number 41TYZ-B synchronous motor?

Sounds like you already have the part number. If you're trying to find one, try using Google.com and just type in that number in the search window. It may come up. That's where I usually start when looking for replacement parts.

What happens if you overcompensate with 20mF capacitor for the inductive circuit instead of 10mF capacitor which already satisfy the power factor to reach 0.95?

there would be no problem with this == == The inductive circuit has a 'lagging' power factor. If you over-compensate with too much capacitive reactance, you could go over the top (past 1.0) , and end up with a leading power factor that may even be numerically worse than when you started.

== == == ==

What is the difference between dol and hdol?

Direct on line starter and Heavy direct on line starter...... in HDOL CT is fixed.

What is the main cause for the coefficient of coupling of a transformer being less than unity?

initially the induced emf i.e.,self inductance is high than mutually induced emf in the other .....so coefficient of coupling is high

How does lightning create surge current?

A: In the sky there is potential caused by friction of particles. This is a potential to release the charge if a path is found to discharge like earth or another cloud At that time current can flow Millions of amperes will be discharged to earth for that split instance a building can rise to 1000 of volts with respect to earth ground What it means is that the POWER grid can see a rise or rather a spike on its lines which will reflect all the local distribution as surge of power.

Can you replace an XM radio antenna with any other antenna like a 3ft hard cb antenna?

You can replace an XM radio antenna with a CB antenna, a ham 40-meter mobile

antenna, a cellphone antenna, a GPS antenna, a TV antenna, a wire coat hanger,

a 6 GHz microwave antenna, or a chain of paperclips. However, since none of them

is optimized to operate at the frequencies of XM radio, like the XM antenna is, none

of the others will work as well. Most of them will likely be so inefficient at the satellite

radio frequencies that when you use one of those, you hear nothing at all on your radio.

What is the importance of analysis in the design of an algorithm?

There are two main reasons we analyze an algorithm: correctness and efficiency.

By far the most important reason to analyze an algorithm is to make sure it will correctly solve your problem. If our algorithm doesn't work, nothing else matters. So we must analyze it to prove that it will always work as expected.

We must also look at the efficiency of our algorithm. If it solves our problem, but does so in O(nn) time (or space!), then we should probably look at a redesign.

What is a set-up transformer?

it is type of transformer which is used to step up the voltage from low to high value in order to make it applicable for high rated appliances. asha not only for high rated appliances but also for transmission...ashu

If you throw a rope on a high voltage power line will you be electrocuted?

It will be dependant upon the material the rope is constructed from and the physical condition of the rope. If the rope is in a poor physical, dirty and damp condition the conductivity of the rope will be higher and this will surely lead to electrocution . A good clean and well looked after polypropylene or nylon rope will most likely stand the higher voltage and not conduct.

What is the overal power factor is two motors connected in parallel?

It's the ratio of the total power of the two motors and their total apparent power (input side, of course.)

Why the windings burn when transformer is operated in DC?

Transformers are not intended to be operated in DC. DC does not provide the continuously fluctuating current that a transformer requires in order to function. On DC, a transformer will act as a transient mode inductor, and settle out to a high current state, destroying itself.

Why is an i used for current in ohm's law?

I or J = Latin: influare or international ampere.

Another source gives the origin of the I as being from the German word for Intensity.

What is headroom voltage?

reversing the voltage no current flow until breackdown

How can you play the transformers game online for free?

You could try to Google "Transformers Online Games" or visit http://www.transformersgames.org/ - they seem to be the authority on Transformers flash games (browser based games). Good luck!