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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
Auto correlation and cross correlation?
Auto correlation is the correlation of one signal with itself.
Cross correlation is the correlation of one signal with a different signal.
Yes. When resistors are connected in "parallel" (all the left ends connected together and all the right ends connected together) the effective resistance is always less then the smallest resistor in the group. For example If you connected a 2 ohm in parallel with a 4 ohm the effective resistance is 1.33 ohm. To your question; if you connect N equal resistors R in parallel the effective resistance would be R/N . The formula for calculating effective resistance R of a group R1, R2, R3, ... in parallel is: 1/R = 1/R1 + 1/R2 + 1/R3 + .... Note; write the right side as a single fraction by getting a common denomenator then invert to get R.
Technician A say that the current draw should decrease as the voltage decreases?
Ohm's law states the same thing. E = I x R, substitute numbers for E and I and see for yourself. E = 120, I = 10, R = , now E = 60, I = 10, R = what number times 10 = 60
What is the analogy of short circuit?
Im searching for the analogies of the following words 1.Overloading 2.Short circuit 3.Circuit Protectors 4.Electromagnetic Induction 5.Len'z law
How do you calculate how hot a wire can get?
Determine what the wire is made of and look up the melting point of that metal. Once it reaches that temperature it will not be wire anymore but molten metal.
Junction field effect transistor biasing?
When the gate is forward biased, the depletion region is lesser and so the majority carriers(electrons)move freely towards the drain from the source producing high output impedance.When the gate is reverse biased,the depletion region increases(especially near the drain forming wedge shaped depletion)and thus the free flow of the electrons is opposed.hence the output current decreases.The out current becomes zero if the voltage given to the gate is maximum.
Use of monostable multivibrator?
it is used for square wave generation.\
ANSWER: Never monostable is a once fire will never toggle again. Meaning it will work once and never again not until a stimuli is present again.
there AS-TABLE oscillators and monostable
Emitter biasing is when you add a resistor between the emitter of a transistor and the 0v rail so that any voltage developed across the emitter will subtract from the voltage on the base and effectively turn the transistor OFF.
We are talking about an NPN transistor and the transistor is an "ordinary transistor" or BJT (bi-polar Junction Transistor). For more information on transistor biasing see: Talking Electronics website.
What is the importance of convolution in system characterization?
Convolution is used in DIGITAL SIGNAL PROCESSING to predict the output of the system with only a few limited number of samples of the input signal and a few limited number of samples of the impulse response of the system. i.e. if we can state that if you know the impulse response of a system then you can predict the behavior of the system for any signal provided it as an input. It also helps to show that the system is stable or not i.e. we say that a system is stable if its impulse response is absolutely summable or square summable (both are sufficient conditions but not necessary conditions).
What is center tap transformer?
Center tap transformer is the such kind of transformer that is made to a point half way along a winding of a transformer.
It is the 'as if' voltage in an AC circuit. Referred to as Vrms 120 volts in your house is Vrms, the effective voltage, 'as if' it were DC 120V, can do the same work. But 120VACrms is a sine wave with a peak voltage much higher than 120 volts.
thermocouple,piezoelectric transducer,photoelectric transducer.
No.
As base current decreases, so does collector current.
What is relation between size of conductor and voltage?
It depends on the type of Power systems Whether AC ( single or multi phases) or DC ( 2 or 3 wire ) .....ETc
number of conductors
speed
magnitude of the magnetic flux
Depending on the package type and where you buy it, one 4017 costs somewhere between $0.30 and $1.00 US.
How monostable multivibrator can be used to generate?
we can use monostable multivibrator.But generally its o/p is a square wave so to get a pulse type waveform,we may use differentiator after monostable multivibrator....
What is the difference between a PIC chip and a 555 chip?
PIC's are programmable microcontroller chips made by Microchip Inc. PIC's can be programmed to do timing functions, but they can do many other things as well.
555's are dedicated purpose timer chips made by several different manufacturers. They have no intelligence, they are strictly analog electronics.
