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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

What is digital tachometer?

A: It is like an analog tachometer it reads RPM or speed and display in Numbers on a read out. You can find the application on airplanes and your car except it is an analogue instrument. I built one once for my car the read the RPM it was totally unsatisfactory because of the car inherited noise and on a 3 digit readout the least significant number was totally useless. The noise It can be clean out with filters then again the read out will be slow but on a car where the speed changes continuously analogue is proven Superior and most people don't care it it is 100 RPM or 101

What happen if you connect capacitor and resistor in parallel in low pass filter?

Only frequencies in the pass band range will be allowed through the circuit. Other frequencies will be attenuated based on the RC values picked.

Why should dc series motor can be operated for no load and light load?

dc motors can be operated at no load as well as at load condition.But by using the swin burns test the efficiency can be calculated at no load which is more benficial than load test.At industries this swin burns test is used because for load test we have to give separate supply for the load to run.In no load test that power is saved.

What is governor function in the generator?

The governor controls the speed of the power source rotating the generator.

This has to be continually adjusted to match the load on the generator.

As more load is switched on, the generator becomes harder to turn, this would cause the generator to slow down, unless the power unit is adjusted to increase power and correct the speed.

What is the difference between a BCD to decimal decoder and a BCD to 7-segment decoder?

A: A BCD code must be decoded to provide a seven digit output to the 7 bars display that is the only way to see the binary number visually.

What is water level buzzer?

A: It is a relay or another noise maker the sing out if a moist detector sense either no water or water to give an alarm by sounding off

What is drift voltage?

A: Drift voltage is an an wanted voltage that wander off from what is expected. I sources for wandering could be thermal or a component drifting in value.

What is write assembly cache?

the goal of write assembly cache is to assemble writes so that they can be transmitted to memory in an orderly way.

How do you identify terminals in capacitor?

A: If its polarized it will have a bar running along side of the body, A grade capacitor will either have stamped a -+ on it terminal and occasionally a red and black paint dot red is positive. If there is none of these marking then it is not polarized and does not matter how it is connected

What is conclusion of schmitt trigger?

It is an inverting comparator with a positive feedback, can convert an irregular shaped waveform to square waveform. it is also known as squaring circuit.

sudhanshu kumar

siliguri institute of tech.

ece(2nd year)

How many joules are equal to 50000 volts?

Joules is equivalent to power over time. Power is equivalent to volts times current, so your question does not provide enough information to answer.

To look at another way - you might ask how many joules (a measure of energy like kWh - what your electric company bills you on) are in 120 volts. If this were not dependent on current, then you would be constantly billed for every outlet in your home, regardless of whether they are in use. The fact that 120 volts is present at all outlets at all times does not mean that power is being used at all times.

What is significance of stability factor in biasing of BJT?

Stabity factor is not a circuit.It is a parameter,which decides the ability of Biasing circuits,to keep the Q-pt stable in the center of DCLoadLINE.It should be as low as possible

What is the voltage gain of the 2n2222 amplifier?

A: The gain of a transistor is not linear and even that varies from component to component. The gain can vary greatly depending on the Ic current and the load. Manufactures only give out a typical gain for a particular current. As a rule the lower the Ic current the higher the gain. To really find out what a particular transistor characteristics are a tektronik curve tracer is used.

What is the difference between thyristor fuse and normal fuse?

A: THYRISTOR can be used to clamp damaging energy as opposed to a fuse that must blow open and invariably takes time to blow. A thyristor is much faster and controllable actually if the problem disappear it can be made to open up again and restore power for normal operation.

What is the type of capacitance effect exhibited in P-N junction when it is reverse biased?

1. Transition capacitance

2. Diffusion capacitance

3. Space charge capacitance

4. Drift capacitance

Why askerals not used as transformer or capacitor insulation?

because they decompose easily giving out toxic gases.............

Answer

They are cancer-causing.

What causes a damage or alters a pn junction diode?

A: A devices whether active or passive have a power dissipation limits. By abusing this limit the device can become faulty and unreliable

Why the Gate triggered method is always preferred to turn on the thyristor?

A: Because that is the controlling lead of an thyristor. .To do it otherwise it will be on-off at hi voltage only