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Electronics Engineering

Electronics Engineering is a branch of engineering that deals with practical applications of electronic components, devices, systems, or equipment. Electronics are devices that operate on low voltage sources, as in electron tubes, transistors, integrated circuits, and printed circuit boards and use electricity as part of its driving force.

24,372 Questions

How can you increase voltage of an ac adapter?

Increase primary voltage but decraease amerage - eg double voltage and half amperage. This will double your secondary voltage. "Transformed" voltage is easy to understand by following this simple math rule.

secondary voltage divided by primary voltage = no of turns on secondary and no of turns on primary.

eg;

240v \ 12v = 20 (factor)

this means the secondary winding is 20x the primary winding. Basically thats all I know Stick to this rule for step up & step down tranforming & you'll be sweet.

Why must sound and video input to a PC be converted from analog to digital?

Because in order to preserve the original sound, a digital sampling rate must be twice the frequency of the analog signalAnalog data is smooth and continuous, where as digital data, such as the binary data used in computers, has distinct gradations. The process of producing digital data by measuring data at a series of representative points is called sampling.

What is a RF?

RF is short for Right Fielder.

In the context of the category where this question was posted, RF probably refers to "radio frequency". "Radio frequency" usually refers to a rate of oscillation in the range of about 30 kHz (30,000 cycles per second) to 300 GHz (300,000,000,000 cycles per second). This is the range of frequencies of electromagnetic signals we call radio waves. Although RF usually refers to electrical rather than mechanical oscillations, mechanical oscillations in this range can also be referred to as "RF" (that use is a bit obscure though).

How do you draw state diagram for rs flip flop?

state diagram of d flip flop is same as applied input it means.

>if you are going to 0 to 0 than Qn =0

>if you are going to 0 to 1 than Qn= 1

>if you are going to 1 to 0 than Qn = 0

>if you are going to 1 to 1 than Qn= 1

we saw that output is equivalent to applied current input.

ANSWER: There are no diagrams but rather function MAPS where is every input/ output is taken care of its ambiguity to respond.

What is the symbol for a resistor?

The following is the closest I can get using character map:

───►├──

Keep in mind that the gaps are not supposed to be there. It's just a formatting error.

the symbol is like this but without the gap:

--------->|-------

What is the formula of electric current?

the formula for electric current is VI ,where v is voltage then I is the current.

the unit used for current is ampere and volts for voltage. multiply the total I to the Voltage

The formular of electric current is given by I=V/R ,I=P/V

If a diode is connected to a battery and a lamp what happens when the diode direction is reversed?

I diode allows current to flow in only one direction. Therefore, if a lamp is "on" in a DC circuit, and the diode in series with the lamp is reversed, the light will be turnned off due to the diode blocking current flow (unless the voltage is above the breakdown voltage of the diode - if this is the case, the diode will fail). If this is an AC circuit, every half cycle the diode will turn on, then the next half cycle it will turn off. To your eye, the bulb will most likely appear slightly dim due to this on then off cycling. If the diode is reversed, there will be no apparent change. The difference is the half cycle the diode would have been off before reversing, it will now be on, etc.

What is LNB?

The LNB (Low Noise Block Down-Converter) is part of the receive chain of yourVSAT. Located on the feed horn, the LNB converts the satellite signal that was reflected off of the satellite antenna’s reflector fromC-Bandinto anL-Band signal. The L-Band signal is in the frequency range of 950 to 1750 MHz and is considered more manageable. This is partially due to the fact that the transmission of the lower frequency signal can be more reliable when using a coaxial cable than is the case when higher frequency C-Band signals are transmitted of on this type of cable. Virtually all new satellite routers today use L-Band inputs. An LNB can be identified by its F-type output connector.

BY AUQIB KHAN

Which increases or decreases the voltage of alternating current?

(i) EMF (Electro Motive Force) the source of voltage can increase or decrease voltage.

(ii) Load connected can increase or decrease voltage (In case of overload voltage reduces.)

(iii) Resistance of wire - I R loss ( Voltage drop V = IR)

What is an AC generator?

An AC generator is an electrical machine which produces alternating current electricity. It must be turned by a prime mover which can be an internal combustion engine - driven, usually, by diesel oil or gasoline - or can be a turbine, driven either by superheated steam or by water falling from a reservoir. (The latter is known as "hydro-electric power generation").

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Alternating voltage may be generated by rotating a coil in the magnetic field or by rotating a magnetic field within a stationary coil. That kind of system is called an AC generator or an "alternator".

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An a.c. generator, which is usually called an 'alternator', is a machine which converts kinetic energy into electrical energy. Its output is an alternating voltage.

For more information see the answers to the Related Questions shown below.

If you remove one of two bulbs connected to a circuit in a series will the other bulb still shine?

if you have 2 bulbs and one burns out, the other wont shine,

if you remove 1 bulb, you are breaking the circuit, and the current

cant flow to the second bulb, so no it wouldn't shine.

How do you draw EX-OR gate using NOR gate?

You can use a second gate on the same IC to invert the output (most OR-gate ICs I know of have 4 gates per chip). Do this by tying the output of the first gate to both inputs of the spare gate.

What are pressure transducers used for?

== The most common use of piezoelectric transducers is in sonography. That's sonar. And medical sonography, the so-called ultrasound, represents the broadest application of the technology. The ultrasound is in use in medical imaging right now in a number of places around the world. It is very common for pregnant women to undergo the proceedure. They are also used in speakers and the like, in applications as a "force gauge" and as a method of control for scanning tunneling microscopy. They are also used in basic physics research such as the study of so-called Fermi surfaces where ultrasound is passed through a crystalline sample in a magnetic field. == Piezoelectric transducers are used to measure dynamic events. The events a piezoelectric tranducer can measure is typically relative to a force. Such as vibration (dynamic g forces), force / impact (dynamic in nature), and pressure (once again dynamic). Piezoelectric transducers do not measure true static events. Such as your weight when stepping on a scale. What a piezoelectric will measure is the impact of your body stepping on the scale and any changes in force applied to the scale. Some examples of use would be in manufacturing where a press is being used rapidly. Piezoelectric pressure sensors are used to measure the dynamic events of pressure. Such as the turbulance in a pipe or combustion pressures in an engine. Piezoelectric accelerometers measure g forces dynamically. This is generically considered vibration. This measurement can detect bearing faults in a motor from its 'vibration' or the structural integrity of an aircraft based on its vibration and response to the forces put into the structure. A material that generates an electric charge when mechanically deformed. Conversely, when an external electric field is applied to piezoelectric materials they mechanically deform. This above effect is called Piezoelectric effect Every day use of this phenomena is used in load cells. Load cells are used on large weigh scales for trucks and large bin scales where materials need to be weighed. The signals from the cells are calibrated to compensate for the weight of the scale so that the scale can be zeroed out. The cell signal because it is very small is sent to an amplifier head where is can be read by the operator in units of weight. The head unit can be set to read in metric or imperial weights.

Why a DC motor is called DC motor?

DC, in DC motor, is an acronym for Direct Current, which means that it works on direct electrical supply by a battery. In an AC motor, the motor runs on Alternating Current Supply from other sources other than batteries, such as electricity from your house.

No, d.c. is not an acronym. It is simply an abbreviation.

"a word formed from the initial letters or syllables taken from a group of words"

http://www.thefreedictionary.com/acronym

Yes, a word. "dc" is not a word.

What is the common use for a multimeter?

A multimeter is used to measure various properties of electricity. The "multi" refers to it multiple functions which can range from volt meter, current meter, resistance meter. The most common use would depend on the users preference to what is needed and measured most frequently.

When the resistance in a circuit increases what happens to the current flow?

"Ohms Law" defines resistance (R) as the the ratio of voltage (V) to current (I).

R = V/I

If you move those variables around, you can get the formula:

I = V/R

So you can see that when resistance increases, current flow will decrease.

Comment

Resistance is most definitely not defined as 'the ratio of voltage to current', although that ratio may tell you what it happens to be.

Resistance isn't a variable in the Ohm's Law equation. It is a constant because it is unaffected by either current or resistance.

How do you detect direct current flowing through a wire?

See this link for a very good answer (solution) to your question:

http://www.discovercircuits.com/DJ-Circuits/pumpmotormon2.htm

Posted by: trwtommy@gmail.com

Sorry I just noticed you want this for a DC voltage line, For this you would need to design in a flip-flop circuit to the circuit at the link above. If you need this, just email me and I can do this for you.... at a cost of course ;-)

Why capacitor in transistor amplifier circuit at input?

Because capacitor not allow to pass dc voltage,but capacitor allow ac voltage and signal.Purpose is to block dc voltage.That is coupling condenser.

How do you draw DC load line and determine the Q point?

we should be take two point from the the graph between collector current and emitter-collector voltage.. along the horizontal line collector current is zero and emitter-collector voltage become Vcc,and along the vertical line emitter-collector voltage is zero and collector current become Vcc/RL then by this line that drow between this two point is called load line that in this line the transistor allowed to operate....

What is the function of governor in a generator set?

The function of a governor in a generator set is to regulate the speed of the engine. It works by controlling the fuel flow to the engine, adjusting the throttle settings, and maintaining a constant speed regardless of the load demand. The governor ensures that the generator provides a consistent and stable output frequency and voltage.

How does an electronic governor work?

First it senses the generator speed via a magnetic proxy sensor

It compares the speed with a preset level

Then it gives control signal to the actuator motor that controls the fuel injection pump resulting in change in speed.

This cycle goes in a continuous loop.

Which one is better split AC or window AC?

"Which one is better split AC or window AC?""Which one is better split AC or window AC?"

How is the total resistance in a parallel circuit is determined?

Series, R1 + R2 +R3 etc,,, Parallel 1/R1+R2+ R3,,,,If you have know resistors. If not just use. E/I x R