Electrical Engineering

Advantages : they'd be wonderful on the moon OR in vacuum tunnels bored through the Earth.

Disadvantages : expensive, and by that I mean that their cost does not translate into savings. Like growing corn to make ethanol for fuel when the BTU's spent in fuel and fertilizer exceeds the BTU's you get from the alcohol.

It is a good way, because...

A) It decreases our dependence on OPEC,

B) It decreases our dependence on Arab countries,

C) It decreases our dependence on the increasingly expensive foreign oil,

D) The wind mill process is cleaner than burning coal,

E) The wind mill process is cleaner than burning oil, and

F) Over time, the value of wind mill generated electric power is greater than the investment we need for setting up and maintaining wind mills.

well maglevs are totally different from conventional. here are a few things that make them different: Magnetic Levitation Train:
-faster
-makes less sound
-floats on the track
-uses superconducting magnets
-no engine
-doesn't use fossil fuels
-much more costly
-relatively new compared to conventionals
-used to travel long distances
-transports people
Conventional:
-uses wheels and creates friction that causes sound
-uses fossil fuels
-does not cost as much
-slower
-used in more places
-used to travel long or short distances
-transports passengers and cargo
those are just a few things that makes maglevs diffferent than conventional trains.
Maglevs are powered by magnets, where as a regular train uses a motor and fuel/electricity.

Yes, it is a word. I am almost completely sure it is the study of astronomy.

1.cosine 2.exponential

3.min-max value

4.sine

Yes

Purely additive. 2+3+4+5+6=20.

Did you mean inverter or rectifier? The description normally applies to the latter, and it is a device that turns both polarities of the applied alternating current to d.c. at one polarity. It's essentially two parallel half-wave rectifiers in opposition.

A system which is networked with extinguishing and detection devices to ensure that the danger of fire is low. Smoke/Heat detectors, sirens, bells, sounders and call points are in place to detect any fire and alert you if there is the need to evacuate. A person can manually activate the call point if they discover a fire. When the fire alarm sounds, extinguishing apperatus such as sprinklers, CO2 gas release will activate, in order to quickly put the fire to a halt.

yes,they are equal at only one condition i.e. when the circuit containing R,L and C in series or in parallel behave as a purely resistive circuit. This condition occur only at resonance.

printing

The voltage ratio in transformers used in power supply is set by the ratio of the number of turns on the primary and secondary windings.

Voltage is measured with a voltmeter.

It looks like the crucial number was left out of the question, between the words "volt ... amp DC". If the device says it needs 5 volts at 2 amp, it will run safely on any DC power supply rated at 5 volts and (2 or more) amps.

If the circuit breaker is in the off position there is no need of overload protection. Overload protection monitors the load amperage, If there is no amperage through the circuit there is nothing to monitor.

low accuracy

Knowing the polarity of transformers is important if they are to be connected in parallel.

One software I know is Auto-cad, which is needed for electrical Drawing.

A simple way to look at it is to assume you were spinning a wheel by hand and you were spinning it harder once per revolution. If you applied a load of some sort to the wheel it would slow over a period of time depending on the load. If you continued to manually try and keep the wheel spinning at the same rate, one revolution at a time this would effectively be adding torque to the wheel once per revolution. If you manually mimiced a 3-phase motor you would be manually spinning the wheel 3 times each revolution. This would basically apply three times the torque if each spin used the same force as the single spin did.

mutual inductance

When a sinusoidal alternating voltage is applied in a circuit, the resulting alternating current is also sinusoidal and has the same frequency as that of applied voltage .However, there is generally a phase difference between the applied voltage and the resulting current.This is how alternating-current circuit works.

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Wilhelm Fein invented the portable electric drill in 1895.

220 volt single phase from 480 volt 3 phase that

one wire taken one phase and second wire connected in earth point. we get 220 v

The above answer is incorrect, one phase from a three phase 480 volt system will give you 277 volts to ground. You must use a transformer to get the voltage you need.

Resistors and MOSFET/ transistors are two different animals, sory but