Electronics Engineering

Wire size is rated in Ampacity, so yes, You have to divide watts by the voltage to give you the current (Amps). Strange question, the only use for 22AWG wire that I know of is analogue control, 24 volts, 4-20mA. 22AWG is not even listed in the NEC as a Current Carrying Conductor.

It's constant. The energy delivered depends on how much "on-time" the magnetron has. HIGH = 100% on time, MED might equal 50% (ten seconds on, tens seconds off).

Why make it remote controlled when there are lawnmowers out there that can mow all by themself? You can see info on them at www.lawnbotts.com

Normally used in public address systems, where the audio have to travel long distances and have to drive more than one speaker then a booster transformer is inserted in the audio line, also called audio transformer

I only know of disadvantages, it can cause severe damage in electronic equipment

And advantage is Static electricity can be used to temporarily bond materials together and or compress non conductive material.

The term boolean comes from boolean algebra, which was invented by George Bool in 1854, and described in his work, "An Investigation of the Laws of Thought".

GSM stands for "Global System for Mobile communications", which was a replacement for the former AMPS and TDMA (Time Division Multiple Access) formats of analog cellular telephone transmissions.

GSM is currently used by over 3 billion people across more than 212 countries and territories, over 82% of the world's population.

GSM's advantage over its predecessor is that it is 100% digital, as opposed to TDMA, which was analog. While covering a shorter distance than the analog signal, a GSM signal can carry more voice and data communications than the analog band, and carry it at a faster rate, thus making GSM a "second-generation" (2G) cellular technology.

Most GSM networks operate in the 900 MHz or 1800 MHz bands. Some countries in the Americas (including Canada and the United States) use the 850 MHz and 1900 MHz bands because the 900 and 1800 MHz frequency bands were already allocated.

Are you touching the bulb with your fingers? Oil in the skin causes hot spot on the bulb and causes them to burn out.

1. As amplifiers, usually as current amplifiers, but sometimes to amplify the voltage instead (where a FET is typically used). Think of the amplifier in a stereo system for example.

2. As switches. Usually as part of an Integrated circuit, although discreet components can be used to make individual switches. Think of solid-state relays for example.

3. As a buffer or impedance matching between mis-matched circuits. Think of the input to an oscilloscope circuit, where it has to load the circuit under test only very lightly.

4. As a regulator. This can be to regulate current, voltage, or power. Think of power transistors in the power supply for the stereo system for example.

You will find out for yourself in 20 years

moving a loop of wire through a magnetic Field. The rotation of a coil of copper wire trough a magnetic field changes magnetic field as "seen" from the coil inducing an alternating current.

Who says they don't?

I can't resist the urge to quote "The Hitchhikers Guide" saying space is REALLY big... electrons are tiny compared to the "empty" space in atoms and molecules. There's a low probability that two will intersect.

Diodes convert AC into DC by allowing current flow in one direction only. Since AC is alternating between plus and minus it is not possible to use a diode to allow AC to flow in one direction and not in the other direction.

480 volts is probably 3-phase (Line to line) voltage, so:

1500K / (480 x 1.732) = I = 1804Amps

An attenuator is an electronic device that reduces the amplitude or power of a signal without appreciably distorting its waveform. attenuator just decrease its amplitude and the attenuator you can take it as a opposite of amplifier. Amplifier just modifies the input signal gives amplified output signal

The first clue is a burnt board. There are many different types of transistors which complicates determining "for sure", beyond this visual observation. The absolute best way is to remove it from the circuit and test it per the specifications in the data sheet for that particular transistor.

A simple test to see if "maybe" it is good can be done by checking the base or gate voltage to emitter. This is usually .5-.7 volts in a BJT. If it is burnt out, or there is not enough voltage applied to the base, it may be burnt out. If you can open the circuit up to verify a small current is flowing from base to emitter in a BJT (in a MOSFET, there shouldn't be current flow), and verify current flow from collector to emiitter. If one of these is now an open (I.E. no current flow) you can probably assume this is a burnt out transistor.

So...the simple, sad truth is it is a lot of hassle to check this! In my opinion it is just easier to replace the transistor, assuming you can determine its' exact model number (some manufacturers scrub these, making it harder to reverse engineer things).

The MTRJ connector is unique in design because it incorporates two fiber optic cores into one assembly without the use of a clip. It is always considered a duplex. The MTRJ is also a small form factor connector.

A single phase half wave rectifier outputs ripple the same frequency as the input.

A single phase full wave rectifier outputs ripple fundamental twice the input frequency (assuming balanced recitfiers).

A three phase full wave rectifier outputs ripple fundamental six times the input frequency. So 50 Hz input would yield 300 Hz ripple.

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An objective type of question on optical fiber is on that focuses on the integral part of fiber optic. A good question would be, " Why are optical fibers immune to EMI? "

No triggering is used on an astable multivibrator because it can cause it to become unstable.

The relay coil is an inductor and, as such, resists a change in current. When you de-energize the coil, it attempts to maintain the current flow, but it cannot because you have opened the circuit. This causes a high voltage spike to be developed across the coil which is of opposite polarity to the normal current. The diode conducts, dissipating the current and preventing the voltage from exceeding the safe operating voltage of the driving circuit, often a transistor.

The Diode is wired so that it is in reverse during normal operation, so no current passes through the diode and does not affect the coil it is parallel connected to.

output current is zero

Variable frequency drives use a rectifier to "chop off" the top part of the ac wave, then use capacitors to "fill in" the gaps in the voltage, making a "near dc" power. They use IGBTs, a fancy term for a high speed, high current transistor, or electronic switch, to pulse the "near dc" power out to the motor, in a pattern that appears like ac to the motor.