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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
A: nothing except that the most powerful will predominantly effect the receiver and even that is a function of distance to or from
Is it safe to eat or drink while soldering?
No
ANSWER: lead is poisonous to humans on a grand scale. like mercury It collects and add up.
certainly putting solder the mouth is bad. Lead replaces calcium
Why do you need to use op-amp in 0.5 gain?
The question isn't very clear. You don't need an op amp to decrease a signal amplitude by 50% / 3dB / .5. You could use a carefully set up voltage divider. But if you are in need of a buffering circuit for either the input or the output, an op amp is a cheap, well designed, and easy to use solution.
Is ohms law applicable to filament?
Absolutely not! A tungsten filament is an example of a non-linear or non-ohmic material, and it does not obey Ohm's Law. Ohm's Law is a law of constant proportionality; in other words, for it to apply, the ratio of voltage to current must be constant over a wide range of voltages. Increasing the voltage of a tungsten filament to its rated voltage causes its resistance to increase around 15 - 18 times, compared with its 'cold' resistance. Therefore, the ratio of voltage to current changes significantly as the applied voltage changes -so it does not obey Ohm's Law.
However, the ratio of voltage to current will always tell you what the resistance happens to be for any particular ratio. Since, for tungsten, because the ratio increases as the voltage increase, the resistance changes too.
To summarise, for Ohm's Law to apply, there MUST be a linear relationship between voltage and current; with tungsten, the relationship is a curved line and, so, it is non-linear and does not obey Ohm's Law.
Why do you regulate voltage but not current?
you can regulate either, it depends on the requirements of your circuit.
How important is computer programming in electronics field?
It's important because it is almost impossible to name an electronic device that does not have a microprocessor in it. If you're just repairing electronics it's nominally important. However, if you're designing or creating new gadgets or robots you will need to understand how to program and advanced techniques in programing to be efficient with your programming.this is important so you can get a good job
Where are current supplies of petroleum?
I have included to related links. The 3 largest producers of petroleum are Saudi Arabia, Russia and the US. However, the US consumes its production. The countries with the largest reserves of oil are Saudi Arabia, Canada and Iran.
How did silicon chips change the way you compute?
Not at all, except for the first few computers I used (which were built with discrete germanium transistors) every machine I used was built using silicon chips. If the first computer you used was in the 1980s or later, you probably never saw a machine that wasn't entirely silicon chips. Even the germanium transistor machines ran about the same as modern computers, except the I/O which was usually very mechanical.
Give two possible reasons why their circuit does not work when they close the switch?
The cell has no more electricity and the bulb has blown.
There is no need for a combinatorial circuit to multiply a number by two. A binary number, left shifted one place, is twice the original binary number. The specific answer to the question is that you would connect the three input lines to the three high order output line of four output lines, and connect the low order bit of the four output lines to logic 0. If the three input lines were labelled A, B, and C, the output would be A, B, C, and 0.
Which is the best ic or transistor amplifier for good sound quality?
Smooth clear sound comes from IC and transitor has more loudness and more bass and also consumes more electricity , transistor is good for outdoor used but if u love more loudness then try transistor
What is resolution of a digital counter?
That depends. LED (light emitting diode) displays are constructed of diode grids. The entire segment of a number lights up, and each number is composed of seven parts, not counting the decimal light. Otherwise a single 3x5 grid is big enough to display a single digit.
At resonance, the L and C impedance cancels out, so the current can be calculated based on the resistance and applied voltage.
Imagine increasing frequency of the supply from 0 Hz to very high. At low frequency, the impedance of the inductor is ~0 (defined as Zl = w*L*j), and the impedance of the capacitor is very large (defined as Zc = 1 / (w*C*j)). As you increase the frequency, the impedance of the capacitor will decrease, as the impedance of the inductor increases. At some point (the resonant frequency), these two will be equal, with opposite signs. After crossing the resonant frequency, the inductor impedance will continue growing larger than the capacitor impedance until the total impedance approaches infinite.
What mathematical formulas is used to find the average value voltage for an ac voltage?
The RMS value of an AC voltage is VRMS = VPEAK / sqrt(2), where VPEAK = the voltage peak to neutral.
Answer
The average value of a sinusoidal a.c. voltage is zero.
How might a gallium chip compare with a germanium chip?
Gallium is a metal, not a semiconductor. You cannot build a transistor or even a diode with a piece of metal, forget an IC chip containing several transistors.
To create a gallium based semiconductor, it must be ALLOYED with one or more of the following elements: nitrogen, phosphorus, arsenic, or antimony. The simplest semiconductor alloys are: gallium nitride, gallium phosphide, gallium arsenide, and gallium antimonide. Examples of other semiconductor alloys are: gallium nitride phosphide, gallium phosphide arsenide, etc. (these are used in some types of LEDs).
The most common gallium alloy semiconductor for making transistors and IC chips is gallium arsenide. Compared to both silicon and germanium, transistors made of gallium arsenide are significantly faster, and additional speed can be obtained by using nonsaturating logic circuits like ECL.
How can system configuration affect voltage and current?
I don't know im doing this same worksheet lol probably mr kullens:)
Can a short circuit current through a photo cell damage it?
If the photo cell was on during the short circuit then the chances of damage to the photo cell are at a minimum. If the short circuit occurred when the photo cell was operated then yes damage to the internal contacts of the photo cell could have happened. What happens is, the short circuit is downstream from the photo cell and when the contacts of the relay close in the photo cell the dead short is applied to the contact faces of the relay. This is somewhat like striking an arc with a welded with the same results, the contact faces weld close and the circuits breaker trips to open the short circuit. With the pole faces of the photo cell's relay closed it gives the illusion that the photo cell is not operating. The photo cell's circuitry will be working but the relay will not drop the circuit open because of the welded contact in the relay.
No, knowledge is factual whereas logic is the ability to reason. For example, if a little boy is too full to eat his vegetables, but he says he is hungry for chocolate, that is not a logical statement.
Which microcontroller is used mostly in industry 8051 or pic?
8051 is an old microcontroller design. It has been updated and expanded into a family of microcontrollers manufactured by several companies.
PIC is not a microcontroller, but is an extensive family of microcontrollers designed and manufactured by Microchip, Inc.
Both are quite popular, and there are many other microcontrollers available.
