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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 do you remove and replace faulty components without causing damage to circuit boards or surrounding components?

Very carefully, and with practice. There is some equipment that is helpful such as special needle nose pliers, tweezers, clamps, solder removers, etc.

Can you saturate a CT with the secondarys shorted?

A CT becomes saturated when the induced secondary voltage is beyond the capabilities of the CT. Yes it is possible, if enough current is forced through the secondary to raise the voltage beyond the CT capability curve. Remember the CT has inherent resistance due to the secondary winding.

That said, to saturate strictly based on the CT resistance is unlikely. But it is still theoretically possible.

How do op-amp amplify in signal conditioning?

If an inline capacitor is inserted in the feedback from the output to the input of an op-amp it will act as a frequency filter and only boost audio frequencies within the resonant frequency range of the capacitor. If you gang multiple op-amps in a wein bridge arrangement you get an analogue audio filter capable of shelf boost or cut.

Why in short circuit test iron loss is very less?

In short circuit test very low voltage at primary approx 5 % of the rated voltage is given and secondary is short circuited by an ammeter. Due to low voltage very low flux is developed in core of the transformer and due to that iron losses are very low which can be neglected.

By Rizwan:

actually it is operated at (10-15)% of the rated voltage and as you know n case of low voltage low magnetic flux is produced and then there will be low magnetic field density(B). and we know hysteresis and eddy current losses depend on (B).as in case of :

hysteresis depends on B^1.2 and

eddy current depends on B^2

So if B is low then both losses(collectively called constant losses) will be very very low.

What is alpha cut of frequency?

it is the frequency at which the current amplification drops 3dB below its low frequency value.

What is mesh analysis?

Mesh analysis is a method to solve a circuit. when a circuit is planer then mesh analysis can be applied in this circuit otherwise it can not be applied. For non planer circuit nodal analysis can help to determine current or voltage. Mesh analysis reduces the equations to get current.

What resistance value is add to convert a galvanometer into a voltmeter?

It depends on the resistance of the galvanometer and the current required to reach full scale. A 100 ohm meter requiring 1 milliampere would require 99.9 KOhms in series to become a 100 volt voltmeter.

How tight should one tighten a Rubber fernco coupling?

If you don't know, you probably should just go ahead and call a plumber! Lol. Seriously though, hand tight with a nut driver is usually adequate

What is the use of transistor in water level indicator?

It is used to amplify the current. The common-emiiter amplifier is designed so that a small change in voltage (Vin) changes the small current through the base of the transistor; the transistor's current amplification combined with the properties of the circuit mean that small swings in Vin produce large changes in Vout. Various configurations of single transistor amplifier are possible, with some providing current gain, some voltage gain, and some both.

Why UJT is called as transistor?

Even though it has only two types of charge carriers we will not call it as a diode but a transistor since it is a three terminal device.

What will happen when source resistance equals load restiance?

when source resistance and load resistance are equal maximum power is transfered

Why you use current source in data transmission?

A: The main advantage for a current source transmission is low source impedance. extraneous voltage influence is reduced by that characteristic.

How the AND multiplication different from the ordinary multiplication?

A: Humans use the decimal or the 10 numbers systems since i guess we have ten fingers. And we do the mathematics using the ten digit numbers. Computers use the binary system two digits "0" "1" and it recognizes as true or false that is machine language all the computations are based on these two binary numbers

What voltage is required fot 30 A to flow through a 15k ohm resistor?

Volts = amps x ohms so 30x15000 or 450000 volts. The power is 30x450000 watts so it's going to get mighty hot, very quickly.

Are xor and xnor equal?

It depends. XNOR is the inverse of XOR. If the N(ot) part is on the inputs, then they are equivalent. If the N(ot) part is on the output, then they are not.

What is mems and its application?

A: An application is a means to explain how where a particular IC or DEVICE or CIRCUIT can be used for. Example an op amp can be used for many applications amplify sum subtract generator multiplier and so forth. Each of these are application for a particular device.

How do you step up ac voltage without using transformer?

A: Using a diode and a capacitor and replicating for the voltage that is desired. Be aware that the final voltage can be very hi for 120 v AC and be aware that the voltage is there but the power is limited due to repeating losses along the way.

What is gain roll off?

A: As frequency increases all amplifier exhibits losses due to internal capacity or internal devices frequency limit. At the hi end of the frequency the amplifiers begins to loose gain gradually as a function of higher frequency that is what roll off is.

What is the use of clipper circuit?

Clipping circuit is a wave-shaping circuit, and is used to either remove or clip a portion of the applied wave in order to control the shape of the output waveform. One of the most basic clipping circuit is the half-wave rectifier. A half-wave rectifier clips either the negative half cycle or the positive half cycle of an alternating waveform, and allows to pass only one half cycle. Such a circuit has great applications in radars, digital computers and other electronic systems for removing unwanted portions of the input signal voltages above or below a specified level. Another application is in radio-receivers for communication circuits where noise pulses that rise well above the signal amplitude are clipped down to the desired level. Clipping circuits are also referred to as voltage limiters, amplitude selectors, or slicers.

How do you convert spatial code into temporal code?

It can be converted using a Shift register.

A Serial-In-Parallel-Out(SISO) shift register is used to convert temporal code to spatial code.

A Parallel-In-Serial-Out(PISO) shift register is used to convert spatial code to temporal code.