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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

Compare the phase relationship between the voltage and current in a purely resistive circuit and an RL circuit?

In a pure resistive circuit the voltage and current are in phase. In an inductive circuit they are fro zero to 180 degrees out of phase. If they are in phase the Power Factor is 1 and 180 degrees the PF is zero. The exact amount of the phase difference depends on the specific circuit.

Why is the base of transistor made very thin?

Base of transistor is made thin just to get Collector current equal to Emitter current.

What are the disadvantages of Digital Signal Processing?

There can be few ,

1. Speed & the Cost

DSP Design cost can be very expensive when large bandwidth signals are involved . Even the ADC ( Analog to Digital Converter ) and DAC ( Digital to Analog Converter ) device prices are high for large BW scenarios .

Speed is another concern . Currently DSP devices are not faster enough to cater all the requirements in the world of signal processing . At the moment only up to moderate BW Signals can be processed . Bandwidths are in the 100MHz range are still being processed by analog methods since the DSP methods available are not faster enough .

2. Design Time

DSP Design time may be too long . And for DSP design, you should have a skilled, and perfect people who knows well about the DSP techniques . Also you should have the required toolset, specially the required software packages . Without these the DSP sometimes be impossible .

What is the impedance of water?

Impedance of water is the density of water times the sound velocity in water

ANSWER: Pure water has a high resistivity. An ohmmeter i a good way to check for quality of water. If resistance is low it means that it is has other material floating in there.

What is relationship between gain and bandwidth of an op amp is?

An op amp can have a very large gain, but a limited bandwidth. If you decrease the gain, you can increase the bandwidth.

What are Block diagrams for online and offline UPS?

Online UPS is a power supply that is not interrupted during the switch-over of the power. There is a short cut-off on the offline UPS which can have an effect on affected loads during transition.

IC 741 is an?

It is an opamp chip consisting of 8 pins

What is the input current for common collector?

from the name itself the common collector has its collector terminal in common with both the input and output circuits of a transistor and the base current is chosen as the input current and the output current is the emitter current

Which technology is remarkable in electronics field?

A What is remarkable is the search to implement solar components into cloth since our military uses an awfully amount of battery to run its communication equipment. That would be remarkable

Is the frequency domain plot of a voice signal discrete or continuous?

The frequency domain of a voice signal is normally continuous because voice is a

nonperiodic signal.

What is the PCB and its location?

PCB technologies is an information technology company in Johannesburg, South Africa. A PCB populated with electronic components is called a printed circuit assembly (PCA), printed circuit board assembly or PCB assembly (PCBA). In informal usage, the term "printed circuit board" most commonly means "printed circuit assembly" (with components).

What is the difference between capacitor and transistor?

transistor either increase or decrease current bt capacitor stores the energy

What is sensitivity of a potentiometer?

Sensitivity of potentiometer means~ smallest potential difference that can be measured with the help of it.

What are series capacitors?

Capacitors are said to be connected together "in series" when they are effectively "daisy chained" together in a single line. The charging current ( iC ) flowing through the capacitors is THE SAME for all capacitors as it only has one path to follow.

Then, Capacitors in Series all have the same current flowing through them as iT = i1 = i2 = i3 etc.

Therefore each capacitor will store the same amount of electrical charge, Q on its plates regardless of its capacitance. This is because the charge stored by a plate of any one capacitor must have come from the plate of its adjacent capacitor. Therefore, capacitors connected together in series must have the same charge.

QT = Q1 = Q2 = Q3 , etc.

If a 325 watt heater has a current of 6.0A what is the resistance?

Watts = Current x Volts with your resistive heat application. To figure out resistance you need to know voltage and current. Since you are drawing 6 amps then Volts = 325/6. This means that there is about 54 volts supplying the heater which seems like a very strange supply voltage. Since Volts = Current x Resistance the resistance = 325/36.

Explain quadrature null effect of coherent detector?

zero demodulated signal, which occurs for phase angle equal to + or - 90degrees, represent Quadrature Null Effect of the coherent detector.

Whtat is the invention that made possible a revolution in electronics?

The really radical change in electronics was the invention of the transistor. It was not very pretty, it was not very big, but the world was made a far better place because of it

Why Ge and Si is not used for making LEDs?

Ge and si are not used for Making led's because these two emitts less amount in form of light and larger amount in form of heat.

What are the advantages and disadvantages of the cathode ray oscilloscope?

Cathode ray oscilloscopes are relatively fragile and expensive. They can also be less accurate than other option. One advantage that they do have is that they are well protected from damage if a signal is significantly stronger than expected.