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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 the difference between half adder and full adder in computer organization and architecture?
- A half adder has 2 inputs and 2 outputs, these are usually called something like: Ain, Bin, Sout, Cout.
- A full adder has 3 inputs and 2 outputs, these are usually called something like: Ain, Bin, Cin, Sout, Cout.
A half adder cannot propagate carry as it has no carry input, a full adder canpropagate carry. A full adder can be built from 2 half adders.
What are disadvantage of lc oscillator over the RC oscillator?
1. The output is small due to smaller feedback.
2. It is difficult for the Circuit to start oscillations.
3. The Frequency stability is not so Good.
4. It requires high Vcc. For large feedback.
Identify the three pieces of information that should always be printed on a pipeline warning signal?
A. ownership of the pipeline
B. emergency phone number
C. information about the pipeline contents
What should be observed when connecting a volteter into a DC circuit?
polarity is of major importance in dicect current circuits.
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When using meters please remember that a volt meter does not connect into a circuit, the leads are placed across the component that you are measuring. It is an amp meter that connects into the circuit, becoming part of the circuit, to measure the current flowing through that circuit.
Multimeters measure AC in two primary ways... The older style meter uses a diode, capacitor, and resistor to measure the peak voltage of the AC signal. They then compensate their calibration to read in a close approximation of what the RMS value will be. Problem is that this only works well for true sinusoidal waveforms - if the waveform is triangular, for instance, the indicated value will not match the RMS value. The newer style meter, if it states that it is a true RMS meter, will sample the input waveform and actually calculate the RMS value. This is done by adding up the squares of the input, and then taking the square root of the result. That is a much better approximation of how much power the waveform can deliver.
What are the application of voltage shunt amplifier?
Applications of Voltage shunt feedback amplifier?
How do you measure current without connecting the load?
Without load there is no current so it is impossible to measure it.
Why cosine wave is used as carrier signal in all modulation techniques. why not sine wave?
The sinusoidal wave is harmonically pure, i.e. it only has one frequency in the frequency domain. If it were not harmonically pure, i.e. if it were not sinusoidal, it would be more difficult, if not impossible, to demodulate it at the receiver.
The 'm' in dBm means the power is referenced to 1mW. So, the power in dBm equals 10 times the log of the power in mW, or P(dBm) = 10*log(P(mW)/1mW). For example, 1W = 1000mW, so 10*log(1000/1) = 30dBm.
What are Top M Tech colleges in India?
as far as ranking of M.Tech colleges are concerned ,it depend upon various factors like courses, infrastructure, facility for research, global exposure, industry oriented approach almost every technical university provide M.Tech courses but the best of them are
IISC Banglore
and IITS
some others are also good like BITS Pilani DCE, NITs etc for more information you can go through the following useful site
How does a jet pump work in a water well?
The most basic jet pump has a round pump chamber containing an impeller. The outlet to the well is large and the outlet to pressure tank is small. When the pump is primed and switched on it will suck water in and expel it at a higher rate. They are very susceptible to air leaks -every connection MUST be airtight.
What does a 'thermistor' measure?
A therm is used by gas companies to convert the volume of gas used to the equivalent of heat. It then calculates the actual energy used.
What happens to the energy in a circuit when the current passes through a component?
A: If there is resistance within the device it will cause to dissipate some of the energy as heat. The rest will continue
What is a quantity that measures the rate at which work is done?
Work is usually measured in joules, which are a unit of energy. Work/time is called power and is usually measured in Watts (joules/second) other common units of power include Horsepower and ft*lbs /sec.
in short, is is power, which is measures in watts.
What is the cutting voltage of a silicon diode?
It is not 'Cutting voltage' but it is Cut-in voltage'. It is the voltage at which the diode turns ON. For silicon it is 0.7v. After reaching 0.7V diode current starts increasing rapidly for little increase in voltage.
Why does the current decrease when frequency increases?
That depends on actual circuit impedances and without knowing them cannot be answered in any way. But if all the circuit impedances are purely resistive, there will be no change in current flow with any change in frequency.
What happens to ripple frequency when one diode is removed from bridge?
actually a diode is forward biased by at least 0,7 volts.so what it means is that when it is removed that 0,7 voltage drop on the diode is eliminated thus increasing ripple voltage
Resistance (Ohms) = Potential Difference (Volts) / Current (Amps)
So, 12/0.25 = 48 Ohms.
What is the difference between AVR microcontroller and pic microcontroller?
The difference is base on the requirement of their0 application.
The time it takes to fully charge a capacitor depends on the capacitance and resistance of the circuit; the voltage is irrelevant. The equation you need is:
t = 5RC
where: t = time in seconds, R= resistance in ohms, and C =capacitance in farads.
So you should now be able to calculate the time for yourself, but remember to convert the resistance into ohms and the capacitance into farads before you insert the figures into the equation.
Difference between ceramic and electrolytic capacitors?
- In ceramic capacitors the dielectric is a thin layer of ceramic and both plates are metal foil. These capacitors are unpolarized. These capacitors have negligible internal inductance or resistance.
- In electrolytic capacitors the dielectric is an ultra thin layer of corrosion on the surface of a metal foil plate and the other plate is an electrolyte paste. These capacitors are polarized and if connected backwards are likely to explode. These capacitors have significant internal inductance, making them bad filters of noise in the MHz range and above which requires ceramic capacitors.
