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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

Is the output power more than input power in a transformer?

No. By "energy", you must mean "power"?

Energy = power * time.

Anyway,

No transformer can step up energy. Even in a perfect transformer, you would only receive the energy output equal to the energy input.

There is always some loss of energy due to resistance of the windings and unwanted electrical currents induced in the core. Both convert some of the energy input into heat.

What is pulmunary circuit?

Pulmonary circulation is when the right ventricle contracts sending blood through the pulmonary artery to the lungs to get oxygenated, then back through the pulmonary vein into the left atrium.

Amplitude and frequency?

If if you think of the sound of music, the amplitude tells how loud it is and the frequency tells how high the sound is.

Amplitude is the measure of a magnitude of oscillation of a wave .

Frequency is the measure of number of times that a repeated event occurs per unit time.

f = 1/T

f = frequency

T = time period

Why does the output frequency of a full wave rectifier double that of input frequency?

One cycle of the AC input consists of a positive half-cycle followed be a negative half cycle. The FW rectifier basically reverses the polarity of one of the half-cycles, so there are now two positive pulses per single input cycle, effectively doubling the frequency.

Of course the rectifier may be wired for the opposite polarity, with two negative pulses per input cycle, but the same principle applies.

How do you choose q point on load line?

the fixed amount of current and voltages are developed across the transistor is called biasing. thus the fixed voltages and current developed are called Q-point

When charge are able to flow directly from the circuit into Earth a ciruit electrically?

That is what the Earth wire does. Normally it does not carry current but it has this important safety function.

What materials are conductors in a torch?

The conducting path of a torch is a simple circuit: Battery to switch, switch to bulb, bulb back to battery. Provided the switch is on, and there are no breaks in the circuit wiring (and the bulb is good), the torch should work.

What is the common transistor configuration used for signal amplifier?

Class A amplifiers for signals and class AB for power output. The bias is often set up as a self biased amp.

What does fob in key fob stand for?

Fob stands for Fresh Of The Boat. FOB is a term for a new person in the country that stands out

What the letters MHz mean?

The M is short for Mega, which is 1 million.

The Hz is short for Hertz, the measure of frequency.

MHz is therefore short for Mega Hertz, or 1 million Hertz.

How level transmitter works?

It just transmits the level of the fluid into electric signal to level indicator and this level indicator will show current level of fluid.The whole setup is used for level measurement.

A Level Transmitter is simply an instrument that provides continuous level measurement. Level transmitters can be used to determine the level of a given liquid or bulk-solid at any given time. This is different to a level switch which only alarms when the level of material (liquid or bulk-solid) reaches a predetermined level.

How do slide switch work?

Slide Switches work on the principle of connecting disconnected parts to each other. The 'switch' connects two parts allowing the current to pass through it. Ash.

What is mean of Dead Short in Electrical Term?

The positive and negative voltage lines are tied together - OR - the positive line is shunted to ground with voltage applied

Improved AnswerA dead short is a connection with zero/near-zero resistance.

It may be applied deliberately in order to perform tests, or, more usually, as the result of a catastrophic failure in some part/component.

"The positive and negative voltage lines are tied together - OR" - both lines of an a.c. supply are connected together.

"the positive line is shunted to ground with voltage applied" - OR - the negative line is shunted to ground, etc etc.

What measures the volume of electrons through a circuit?

Current measures the flow of electrons through a circuit and voltage basically measure the amount of available electrons.

Why current transformer secondary side short circuit?

A current transformer (or CT) is constructed in a specific way so as to step down the current in a high power circuit for measuring or protective relaying purposes. Typically, it will have a toroidal-shaped iron core with the secondary windings wrapped around it. the primary "winding" is usually the conductor of the main power system passing directly through the hole in the center of the CT. As a result of this construction, if the secondary windings are left open, a very large flux can develop, resulting in damage to the CT and possibly even the other equipment it is attached to. As such, if the CT is not going to be used, its secondary windings need to be shorted.

What is voltmeter sensitivity?

Voltmeters are connected in parallel with the components whose voltage or voltage drop you want to measure. That means that the internal voltmeter's resistance will create a new branch in parallel with the component, thus increasing the current in the circuit.

If there are other components in series with the component to which the voltmeter is connected, this increment of current will increase the voltage drop across them, reducing the voltage drop across the component whose voltage is being measured. This is obviously an induced error in the measurement, which adds up to other errors built into the voltmeter (accuracy, resolution, linearity, parallax, etc.)

When measuring the output voltage of low resistance (high current) power supplies, the input impedance is usually not an issue. However, when measuring a low current power supply, the input resistance of the voltmeter will have to be at least 10 times the internal resistance of the power supply. Otherwise, the error will be too noticeable.

Therefore, the ideal voltmeter should have an infinite internal resistance. Since this is not the case, it should at least have several megohms.

Analog voltmeters usually have s sensitivity of 20 to 30 kilohm per volt (kΩ/V), which varies withe the voltmeter range setting.

Digital voltmeters, instead, have constant high (>20 megohms) input impedance, which is a combination of pure resistance and reactance, usually capacitive, regardless of the voltage range. That is why the specs of a digital voltmeter always indicate the input capacitance.

What type of particle are cathode rays made of?

electrons

A: It is basically a glass vacuum enclosure whereby electrons are emitted from a cathode by a heating element. A grid control the flow of these electrons and finally hit the face of the tube where is rare earth materials emit photons

How does we calculate the AH in battery's?

Rather trying to explain all the technology that goes into battery construction, go to Related Links. All your questions will be answered there. AH means Amps Hour every battery has that term stated What it means is so many amps can be supplied for so many hours. Means amps Vs time