Electronics Engineering

The meter movement has a current flowing through a coil. That coil is on a magnet. The electromagnet with the needle moves according to the current flow. That flow is established by resistive ladders inside the meter.

this transistor is common emitter configurated transistor nd if emmiter nd collector both terminals are reversed bias then no current will be flowing through th terminal...

this is the voltage regulator IC which gives you +12 volts. after the capaciter it is being used in power supply.In 7812 , the 78 denotes (+ve) while 79 denotes (-ve) i.e.7912 provide you -12 volts. thelast two figure shows the output voltage.

Do you mean 6600mAh? In relation to a battery this would mean a capacity of 6600 milli-Ampere hours. In other words the battery can supply 6600mA for 1 hour.

LED's are light emmitting diodes. diodes have a voltage threshold that must be reached for them to fully "turn on". A resistor can be used to limit that voltage. As the voltage drop across the diode is increased above the turn on voltage (typically .5 - .7 volts), the diode will emmit light. The LED will only light up so far, so by turning the voltage up significantly more will have a very limitted payback in light output.

Laser communications systems are wireless connections through the atmosphere. They work similarly to fiber optic links, except the beam is transmitted through free space. While the transmitter and receiver must require line-of-sight conditions, they have the benefit of eliminating the need for broadcast rights and buried cables. Laser communications systems can be easily deployed since they are inexpensive, small, low power and do not require any radio interference studies. The carrier used for the transmission signal is typically generated by a laser diode. Two parallel beams are needed, one for transmission and one for reception. Due to budget restrictions, the system implemented in this project is only one way.

Laser communications have been a hot topic lately, as solutions for how to satisfy ever increasing bandwidth needs are in high demand. Some have suggested that bandwidth could be distributed in neighborhoods by putting laser communication systems on top of homes and pointing them towards a common transceiver with a fast link to the Internet. With possible transmit speeds of up to a gigabit per second, this is an exciting area. Other applications for this technology include temporary connectivity needs (e.g. sporting events, disaster scenes, or conventions), or space based communications.

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Instrumentation Engineers are responsible for the design, construction and maintenance of instruments and entire instrumentation systems considered being the eyes and ears of any industrial undertaking. The type of instruments needed for ensuring better quality and efficiency of the end product are decided by an instrumentation engineer. responsibile for installation and commissioning. as well as trouble shooting.

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Digital data requires less bandwidth than analog data (e.g. new digital television broadcast compared to old analog broadcast), so more data can fit in the same frequency (e.g. DSL compared to analog modems). This is the primary advantage, although it is also generally stated that data is easier to recover and more tolerant towards interference.

Sometimes we have to send low frequency information, like the tone of the voice of someone talking on a telephone, over a specific channel that only permits a specific high frequency, such as radio frequencies (RF). So how do we do that? One simple, cost effective, and bandwidth efficient method is to change, or modulate, a known RF signal a certain way. Some common ways of modulating such a high frequency signal are Amplitude Modulation and Frequency Modulation. Each of these modulation techniques has its own advantages and disadvantages and are therefore more useful in certain applications.

Not sure of the question, but *electrons flow from cathode to plate in a CRT. A deflection coil guides the electron beam to various areas of the screen. Some CRTs use electrostatic deflection, where the beam is deflected by four grids that steer the beam.

Voltage series feedback amplifiers can suffer from reduced input impedance, which may affect signal source loading. They can also introduce phase shifts that may lead to stability issues. Conversely, voltage shunt feedback amplifiers can lead to increased output impedance, which may limit their effectiveness in driving loads. Additionally, both configurations can experience bandwidth limitations due to feedback network design.

I read this in a book that it's because all class files in Java are identified by a magic number which reads CAFEBABE in hexadecimal assembly. The software engineers that designed Java at Sun used to take a break in a nearby cafe during work hours where they checked out hot girls while sipping their coffee.

The purpose of an electrical panel board or electrical distribution panel is to supply individual circuits from the main distribution board. As the board is supplied with one circuit of high capacity , it needs to be broken down into smaller branch circuits. Breakers accomplish this obligation by plugging into the panels main bus-bars. The load side of the breaker then goes to the specific load. The size of the breaker is dependant upon the size of the load of that circuit. The conductor that feeds the load is dependant upon the size of the breaker feeding that load.

i think that the light bulb glows brighter

That function was traditionally implemented in the form of a mechanical device
known as a "switch".

The practice became so firmly embedded in the art and science of electricity
that the word became the generic term for any device that could perform
any similar function, so that now we have "switching transistors", integrated
"CMOS switches", and even central office telephone-circuit "switches".

Well, I'm not entirely sure, but if this helps, one end of the magnet is South (s) the other is north (n). The north attracts the south pole and the other way round. If north Poles or south) are put together they repel each other.

• The Role of modulation in signal transmission varies because of what type of signal should be modulated.Then how long it should be travel in air.All these points are considered, when we go before modulation.
• Suppose we are transmitting vedio signal means it should be only Amplitude Modulated signal.If we transmitting audio signal means it should be Frequency Modulated Signals.
• So the Role of the modulation is varies in signal transmission.

the THERMORECEPTOR responds to changes in the temperature

The total current in a circuit consisting of six operating 100 watt lamps connected in parallel to a 120 volt source is 5 amperes.

Since power is volts times amps, take 600 watts (100 times 6) and divide by 120 volts to get 5 amps.

yes

No. Semiconductor has negative temp coefficient, because increase in temp causes the increase in the k.e of the electrons bu t not in the no of electrons . these highly energised electronsel increase current, & in terms conductivity.