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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 frequency swing of an FM broadcast transmitter when modulated to 60 percent?
The maxium frequency swing in FM is ± 75 kHz so 75 kHz x 60% = ± 45 kHz
Can an ac motor generate electricity?
An ac motor cannot generate electricity but its shaft can be coupled to that of certain devices like an alternator to in order to generate electricity.
What is the power dissipated a resistor with a current of 0.02 amps and a resistance of 1000 ohms?
P = I^2 x R]
P = 0.2^2 x 100
P = 4 W
What is the function of dynamo in diesel generator?
Weak machines fear it because it measures horsepower and torque.
PLL stands Phase Locked Loop . It consists of phase detector,low pass filter,voltage controlled oscillator,error amplifier
What is the biasing technique in transistor for it to be in active region?
For a transistor to be in active region :
Base Emitter junction should be forward biased and Emitter collector junction should be reverse biased.
What is the function of the RF amplifier?
rf is a single tuned amplifier . Its functions are :-
1.improves selectivity ( i.e rejection of unwanted signal) , so that it prevents heterodyning which results in interference frequency.
2. improves image frequency rejection
3. improves sensitivity ( gain of amplifier )
4.improves coupling of receiver with antenna .
5. improves signal to noise ratio.
6. reradiation of local oscillator through receiver antenna is prevented
A precision diode is a diode with 0V (or near 0V) voltage drop when forward biased, unlike a normal diode which has a finite forward voltage drop of typically 0.2 to 0.8V depending on diode technology.
It is typically implemented with an Operational Amplifier that has a normal diode somewhere in it's feedback path. The circuit utilizes the gain of the Op-Amp to compensate for the finite voltage drop of the diode. Several variations of the implementation exists.
Some applications for precision diodes are
- Rectification or detection of signals with low amplitude
- Voltage gating (selection of the highest or lowest of several voltages)
- Voltage references (replacing Zener diodes)
Why a resistor 10 ohms 5 watt at AV-733 always burned?
There is insufficient information in the question to properly answer it. You did not specify the type of equipment you are talking about. AV-733 seems to be a resistor location, not an equipment specification. Please restate the question.
In general, however, a resistor will be burned for one of two reasons. There could be a malfunction in the circuit, causing more than normal current to flow through it, or the design of the circuit could be such that the rating of the resistor is too small. Power resistors do tend to run hot. Five watts is enough to generate some heat. It is not unusual for a power resistor to look burned. The real question is, is the resistor still working and does it have the correct value. If the resistor is consistently failing, there is something wrong, and just changing it over and over again is not going to solve the problem.
When did the United States stop using DC power in your homes?
We never did, that battle was lost before electrical transmissions lines where anywhere near common.
voltage is pressure and kWh is energy... therefore pressure is energy...
What is the current passing through a circuit if the voltage is 2.5 V and the resistance is 5 kohms?
V=IR so I=V/R
I=2.5/5k=0.5mA
What does a BCD invalid code detector do?
detects the invalid portion of the bcd number codes (1010-1111)
How that what whether and why are all signals of the beginning of?
a Noun Clause... I am on the same test.
If the voltage doubles while the resistance remains the same, the power increases by a factor of four.
Power = voltage times current
Current = voltage divided by resistance
So, power = voltage squared divided by resistance
This has nothing to do with being in a series circuit. It is simply Ohm's Law and Joule's Laws.
Why capacitor charges exponentially why not linear?
because as the capacitor starts charging,the charges which are already built on capacitor opposes the further flow of charges. hence the process gets slow. thats we get sharp curve initially which gets flat further.
What are the applications of programmable logic device?
They are used in DVDplayers, TV sets, controller circuits, interner routers, network switches etc.
What is a positive DC voltage?
A positive DC voltage is an electric potential where excess electrons will flow from negative to positive.
AnswerYou appear to be mixing up potential difference (i.e. voltage) with potential.There is no such thing as a 'positive' voltage if you mean 'positive' in the sense of charge! 'Voltage' means 'potential difference', and you cannot have a positive or negative potential difference in this sense. You can only apply positive and negative in this sense to potentials.
However, if you mean 'positive' in the sense of direction, then a positive voltage is one that is acting in the opposite direction to a negative voltage within the same circuit. For example, where two batteries have been connected in opposition.
What is mode of transmission of tv signals?
The most common mode of transmission of TV signals are digital satellite and cable. New technologies allow transmission of signals by digital terrestrial TV, using aerial broadcasts to a conventional antenna. This provides a greater number of channels and a better picture and sound quality.
What is the formula for calculating the equivalent resistance of a series circuit?
Equivalent resistance of a series circuit is the sum of the resistance of all appliances. The formula is R=R1+R2+... where R is equivalent resistance, R1, R2 and so on is the resistance of the individual appliances.
What is the composition of transistor?
probably Silicium, cause that's what CPUs ar made of, and CPU are a bunch of transistors
