Electronics Engineering

Synchronous impedance is also known as the EMF method. It is a ratio of open circuits to short circuits, when they both are referred to the same field excitation.

Basically . economiser is located in between exit of boiler and entry of air preheater. when the flue gases are coming out from boiler they take away a lot of heat. economiser utilize this heat from flue gases. and these heat is used to heat the feed water which is going to feed the bolier. hence by using economiser the coal consumption required to heat the feed water is reduced hence cost reduced.

FOR tESTING THE SIGN OF CHARGE ON BODY, a device called GOLD LEAF ELECTROSCOPE. When the disc of a positively charged is touched with any plate of the charge capacitor. IF the divergence of gold leaf increases, then the plate is positively charged and if the divergence in the leaf decrease then the plate of the capacitor is nagatively charged.

What motor is NOT suitable for use as a DC machine?

There are several way of getting across a warning signal. For example, hand signals, alarms, and code phrases are good means of low-key communication.

Micro ammeter has higher resistance.

use ohm's law..

Say the voltage applied is 1 V.

then for the ammeter..

I=1A, V=1V

R=1 ohm

for the micro ammeter..

I=0.000001, V=1V

R=1000000 ohms

1

The following are definitely examples of a simple circuit:

-A resistor hooked across a battery
-A lit bulb

The following might be examples of a simple circuit:

-A Logic gate has one or more inputs and one or more outputs but is not necessarily a simple circuit within the chip containing it.

AC always.

DC, or direct current, is an electrical circuit that does not change current flow direction, therefore DC carries an one-way flow of electricity of a certain amplitude value (the amount of power of the flow of electrons). AC, or alternate current, is an electrical circuit of current that alternates its direction of flow, and frequency is a function of how many cycles the current changes flow directions, expressed in Hz.

A DC circuit will not make any sound; there is no change of direction of electricity current flow, so the driver of a speaker driven by DC will just be moving either in OR out, and stays in or out as long as there is a current, but NOT both in AND out, because the DC is creating force on the motor structure of the speaker driver in only one direction due to the one direction flow of the current.

For the speaker to make sound, the driver needs to BOTH move in AND out by changing directions of the current flow. It is this movement of the speaker driver moving in AND out that is vibrating the air to make sound.

So, sound is made by AC, because music is made up of variations of many different frequencies and loudness, with low frequency as the bass, high frequency as treble, and the amplitude of the current expressed as the loudness variation.

Additional information:

* What comes out of your walls is AC at 110V and 60hz frequency, with most houses build with 15 amp to 20 amp circuit capacity. This 60hz has nothing to do with music reproduction, but everything to do with that annoying, low frequency electrical "hum" noise heard in faulty electrical equipment. Your amplifier has to harvest this electrical energy from your wall sockets by converting AC to DC, then back to AC that is analogous to the sound waveform of your music to drive your speakers. In Europe, the household electricity supply is at 220V and 50hz.

* The inward or backward movement of the speaker driver carries the inverse phase of the electrical signal, making sound waves of inverse phase, which can cancel out the forward sound waves made by the speaker, but this is inverse sound wave is usually blocked by the enclosure of the speaker. This is more an issued with low frequency signals as the wavelengths are very long. This is not as much of an issue with higher frequency signals because the wavelength is shorter than the baffle front panel which the speaker driver is mounted on, so most of the inverse waves are still blocked, but this will still decrease its efficiency, or loudness. This is also why a free air subwoofer driver without an enclosure or at least a large panel blocking the inverse sound waves from the back will not make much sound. These subwoofer bass speakers producing low frequency sounds of long wavelengths need a closed enclosure, or a port in the enclosure that redirects this back sound wave with delays so it is no longer inversely phase, which then creates an additive property to bass sound loudness, instead of cancellation of bass sound.

* With the same principle, active noise cancelling headphones all contain an active external mic that is constantly measuring ambient noise, then generates the exact out of phase or inverse sound waves to that of the ambient noise inside the headphones, cancelling out noise. This works better with lower frequency, drone like ambient noise such as wind and engine noise, and does not work well with higher frequency noise, such as human voices. So these headphones still rely on physical isolation for blocking out sounds of these frequencies.

yes sience their is only one path that electricity flows through then it would be depended on that path so if the electricity is not reaching the other bulbs then that means that the electric current is not complete

It depends on the length of th cable and the diameter of the copper cable used.

Newark carries them, just search Newark p/n 05C4624 - they're a tad pricey though, $2.72 each plus shipping.

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advantages of D Flipflop?

Analog to digital conversion done by the ADC's. It's digitization.

... Also referred to as video capture.

A monolithic entity is a type of integrated circuit used in electrical engineering. It has both active and passive devices.

An Analog Signal is a continuous signal, just like an electric current that flows through the copper cables when your electrical appliances are turned on. This continuous signal represents physical measurements. An example of this would be with an analog audio signal, the voltage amount of the signal changes continuously with the change in sound waves. Analog Signals are normally represented as electrical signals, but there is also Classical Mechanics, Pneumatics, and Hydraulics technique's that can be used in analog signals.

Impedance in an AC circuit is like resistance. In fact, impedance is measured in ohms, just like resistance. Impedance takes into account the fact that current and voltage are often not in phase with each other due to capacitive and inductive reactance.

It tells you what the system does to the input signal(s) to generate the output signal(s). The transfer function can be expressed in either the time domain or the frequency domain, depending on whichever is easier to deal with in the application.

The difference between an analog and digitialcomputer is the type of data they process. Analog computers process measured data. A speedometer in your car is a common type of analog device. A digital computer processed descrete data (digits). In this case 0 and 1. Digital computers are most common. PC's, MAC's are digital computers. A big difference is an analog computer's output can vary even if the input is identical. A digital computer can be very precise. For instance, a gas pump might tell you that you pumped in 5 gallons of gas but you could have gotten 4.99 gallons or 5.01 gallons. If you asked a digital computer to add 5 and 6 together, you will always get 11. By the way. A gas pump is actually a hybrid computer. Although it processes measured data, that is how much fluid has passed through the gas hose, the data displayed to you, the amount of gas and how much you owe is in a digital format.

An active satellite acts as a REPEATER; it amplifies signals received and then retransmits them back to earth. This increases signal strength at the receiving terminal to a higher level than would be available from a passive satellite.

A passive satellite only reflects received radio signals back to earth.

fr0m:

ZIA UR REHMAN

D-05-ES-29

DCET Karachi Pakistan.

c =c1 +c2

Capacitors are rated in Microfarads