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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

Why do you give prefer digital upon analog?

digital yes. its more convenient and requires less thinking power. Absolutely no. require the same knowledge. but digital can only have two states where is analog has infinite states.

What are two classic simple harmonic oscillators?

A simple harmonic oscillator is any system that when displaced from equilibrium wil satisfy the equation

F=-kx

Where F is the force (mass times acceleration), k is a constant, and x is the position of the oscillator.

The classical example of a harmonic oscillator is the mass on a spring. When you displace the mass, the spring will cause the mass to oscillate back and forth in the direction of the string. In this case, k is the spring constant, a value that effectively tells you how stiff the spring is.

The second classical example is the small angle pendulum. When you move the mass on the end of a pendulum by a small amount, gravity will pull it back towards the lowest point and create an infinite oscillation. The k in this example is equal to m*g/l where m is the mass of the end of the pendulum, g is the acceleration due to gravity (9.81m/s²) and l is the length of the pendulum.

In reality however, these systems rarely display simple harmonic motion. Due to the effects of air resistance, these systems are constantly being dampened and behave in a much more complex way. In addition, the pendulum case only works for small angles due to an approximation used in the derivation of the formula. Anything more than about 10 degrees and the equation will soon stop describing the actual motion.

What is the typical distance between the primary and the secondary windings of a transformer and how is it determined?

The primary and secondary windings of a transformer are generally wound around tubular-shaped 'formers', and are fitted, concentrically -in other words, they are installed one around the other, and over the same limb of the transformer's laminated core, with the higher-voltage winding outermost. The primary and secondary windings are not fitted separately over different limbs, as represented in schematic diagrams of transformers.

In larger transformers, the two windings must have sufficient separation between them to allow for the circulation of oil. This oil has two purposes. The first is to provide insulation between the primary and secondary windings, over and above the insulation around the wound conductors. The second is to enable circulation for cooling -either by natural convection or by forced circulation.

The actual separation between the primary and secondary windings depends upon the voltage differences between the two windings. Greater voltage differences require greater separation. Typically we are talking in terms of tens of centimetres.

What are the parts of a dynamo?

Electric motor, the alternating-current alternator, and the rotary converter.

A basic dynamo consists of a stator wound with copper coils and a magnetic armature. As the magnetic armature spins it induces a current in the copper coils.

How does the high impedance fault occur in the system?

High impedance fault can occur on fail or low maintenance insulators (e.g. near coastal area) or wet vegetation area (in canyon), and highly loaded industrial area (high harmornics). It all depends on the ground moist level.

When all resistors are equal value the total resistance is equal?

This depends on whether your resistors are in serial or parallel.

If they are in serial, the value of the resistors just adds up, so :

Val(total) = val(single) x n(umber of resistors)

If they are in parallel, each added resistor lowers the total value, while the power rating rises :

Val(t) = 1/ ( val(s) x n)

How do you test xrm110 regulator rectifier?

By checking the output V while operational.

There is also a static test for resistance.

What are the operating regions of transistors?

operating region of the transistor is the area of the voltage and an electronic configuration in which a transistor can work with its full efficiency. In that operating region transistor can be used easily

what above said by harsh is correct...the following may help u further...

Based on application the transistor is decided where to lie.

for example transistors are made to lie in active region to make it as amplifier.

when transistors are used as switch it is made to lie in saturation region(when switch is made as ON) and cut-off region(when switch is made as OFF).....

How do you practically realize the design of a double-stub impedance match using microstrip?

microstrip line is unbalanced line so it works in same way as other unbalanced line. so in double stub, the microstrip line forms the reactance wanted to match. Hey what happened to methods involving the schmidt chart?

Define stability factor?

beta is defined as the rate of change of collector current (Ic) with respect to the collector leakage current (Ico) keeping beta and (VBE) constant also (IB) constant.

How may joules of energy are in a typical 9V battery?

More to the point, how many joules can one get out of a typical 9V battery. This varies somewhat depending upon the load. At low drain currents, (2mA), a typical manganese alkaline 9V battery will provide around 16,000J over its lifetime, assuming it starts out fresh and is discharged to 1V per cell. One can squeeze out a little - not much - more if you run it down to completely dead. At a 10mA draw, you drop down below 15,000J, at 100mA, only about 12,000J. The above is based on discharge curves for Duracell MN1604

What are the differences between series and shunt compensation?

you could compare the VI characteristics of both..talk about damping ability of both as well as their power transfer capability.

What is the cause of input offset voltages and current?

Due to the manufacturing process of op-amps, the differential input transistors may not have exactly the same values, meaning they are not exactly matched. This means that voltage would have to be placed on the non-inverting terminal, with the non-inverting terminal grounded, in order to produce a zero output. The voltage required at the non-inverting terminal in called the input offset voltage.

What is boost coil?

Its function is to increase current. If this coil gets damaged then it has to be changed.

What is the need of embedded system?

It's a method of putting software into a processor that can neither be accessed by the user or corrupted by outside sources.

It's also usually a dedicated system designed to do a specific set of tasks.

" The embedded system are used for creating artificial intelligence with technology so that the system designed for a particular task could perform efficiently without human intervention .For quick performance and to avoid human interventions embedded systems are needed . Embedded system is a part of complete device often including hardware and software designed for special purpose. "