Electrical Engineering

It depends.

A depletion MOSFET can be used as an ehancemnet MOSFET when it is operated as an analog amplifier. However, a depletion MOSFET can't replace an enhancement MOSFET when it is operated as a digital switch.

When a depletion MOSFET is used as a digital switch, since the junction between source terminal and substrate must be reverse biased, the voltage of the source terminal of an N typde transistor must be tied to Vdd, and it is completely opposite to an enhancement MOSFET.

When a depletion MOSFET is used as an analog amplifer, the source terminal and the substrate are both at the same potential, just like an enhancement MOSFET.

A uniform electric field exists between parallel plates of equal but opposite charges.

A transducer is an electronic device that measures something -- voltage, temperature or in this case torque. Torque is the force applied to twist something, like the twisting one does to tighten a screw, bolt or jar lid.

So, a torque transducer is an electronic device that measures the amount of torque being applied to something.

It makes no difference as to what system is being monitored. The meter itself has to be accurate because it comes under the government's weights and measures department. Meters in the field are checked if the consumer thinks there is a problem with their billing. Before a meter is put into service they are all checked for accuracy by an independent agency.

Power system transients are voltage or current spikes, sudden and brief increases or decreases in the supplied power. These can be harmful for some types of electronic devices, and can be seen by a brief flicker of either dimmer or brighter light from light bulbs.

100 WVDC means 100 working volts DC. That is the maximum operating voltage that the capacitor is certified to have across it. Exceeding that rating could puncture a hole in the dielectric, leading to catastrophic failure of the capacitor.

oltc is situated on primary side of transformer because by primary side we can obtain fine voltage change by tapping with low current flow through it.

If the track is fed by overhead power lines then the track is the return path for the electric current and is at earth potential.That is 0 volts

SDH Radio can be use in ring configuration, point to point, add drop and can complement fiber optic ring. For add drop configuration, ADM need to be installed. Just imagine SDH radio a wireless fiber with STM-1 x n capacity.

The 2005 NEC allows 14 amps for 18 AWG wire in conduit, 18 amps in free air. Solid or stranded does not matter. There is no table that allows more current with higher insulation temperature rating. These values are good only up to 86 deg F ambient temperature, and must be derated according to table 310.16 or 310.17 if the ambient temp is above 86. You must also derate for more than 3 conductors in a raceway. I have not seen a PVC insulated wire rated to 105C. Is there such a thing?

delta star

Yes and half the stud width.

first dc generator is max generator donno who invented t

A: A diode array that will conduct if anyone of them are hi as in gates

One cycle of the sine wave is equal to 360 degrees. In US the frequency of power is typically 60 Hz and hence one cycle is 1/60 of a second. Therefore you can calculate the degrees at any instant of time. If at zero degrees the voltage amplitude is zero, then at 90 degrees,which is 1/4 cycle, wave is at peak voltage. At 180 degrees it is at 1/2 cycle and zero voltage and then at 270 degrees it is 3/4 of the cycle and a peak negative voltage. Finally at 360 degrees the cycle is complete and the voltage is again zero.

If you know how many amps your load draws then divide this into 26 and your answer will be the number of hours (approximately) you can sustain the load.

In ferromagnetic materials,such as electrical steel,the magnetisation curve is not a straight line,or else the relation B=μH is not linear ( μ is not constant),H is linear function of magnetization current,while B is linear function of input voltage ,so we have : Im=f(μ)U,where f(μ) is not constant,Im=magnetization (magnetizing) current, U=input voltage.

I hope this will help.

When you switch a voltmeter from a lower to a higher voltage range, an additional resistor is added in series with the meter, increasing the voltage necessary to create the same voltage drop across or current flow through the actual meter movement.

It quadruples.

This term is normally applied to three-phase loads, and describes a situation in which each of the three loads is different in terms of its resistance and reactance. In the case of a wye (star) connected load, this will result in a neutral current flowing -which wouldn't be the case if the loads were 'balanced' (i.e. identical in all respects). You basically have a top heavy circuit that wants to fall over

most devices have physical restraints

a permanent magnet dc motor a very linear device

voltage yields rpm

good example and bidirectional

- voltage doesnt mean -rpm but it will turn the other way at the same speed

if input voltage a yields x rpm

a => x

if input voltage b yields y rpm

b => y

superposition implies

(A+B) =>( x+y)

12v dc motor

volts rpm

0 0

.5 0

1 100

3 300

6 600

9 900

12 1200

so if a= 3v b= 6v

a+b => 900 rpm

the .5 up there is where with the small voltage we dont have enough torque to overcome friction and inertia

at the low end no way to predict when the motor will start

after we get it moving maybe we can run at 50rpm with .5V

say for a we chose12V and for b we chose 12 v

does this mean at 24v the motor will run 2400 rpm?

or is there some reason besides superposition that we call this a 12V motor?

most physical things have boundary conditions

To reduce kWh by capacitor is when a motor is put in. The terminal voltage is reducing and current is increasing it is connected parallel with the motor.

You have to be careful with terms in the electrical field, Example: Main Feeder Circuits will feed a Transformer for distribution and each of those main circuits might feed numbeous Motor control centers. However each of those circuits could be called a main feeder for the motor control center. Confusing. We have High Voltage Transmittion tansformered down for Distribution. So normally a Feeder Breaker will feed Main circuits that will be used for distribution. Example Your home panel will have a main feeder circuit to the whole panel and distribution breakers to you home.

A synchronous generator is operating at lagging power factor (positive P & Q) when it is supplying P & Q to the system. P & Q are positive which means that they are flowing away from the bus where the generator is connected (overexcited case). On the other hand, it is operating at leading power factor when it is supplying P and absorbing Q. The sign of Q is negative which means that it is flowing towards the generator bus (underexcited case).

Obviously by feedback