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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
By Ohm's Law, current is voltage divided by resistance, so if you double both the voltage and the resistance, the current would remain the same.
What are specifications of resistor?
The resistance, the precision of that value, the thermal or electrical environment, the style of indicating these values. There are wire-wound resistors, cracked carbon resistors, carbon resistors and so on.
What specifically does resistance reduce the flow of?
Resistance is the opposition of the atoms in any materiel to the movement of the electrons of a certain current ... so the resistance is a long wire, and thus more atoms to pass through that's how it reduces the electron flow
What should the multimeter be set on to measure charge?
Current is measured in amps so the setting on a multimeter would be A
Measuring current with a multimeter is only to be done by someone with training because it can be very dangerous
It is much better to measure current with a clamp meter
What printed circuit board is the most important circuit board in the computer?
The motherboard aka mainboard
When you start at the negative end of the battery, you start to lose electrons and the circuit is closed.
How does load current vary with the load resistance?
Their relationship is only dependent on the voltage lost across that resistor; voltage equals resistance times current, so increasing the current for a given voltage will require a decrease in the resistance, and vice versa.
What is needed for electromagnetic induction?
An electric current is produced by the change in Magnetic flux over time
Read more: How_do_electromagnets_work
i think it is symbolised with a capital 'e' or 'v' :P hope this helped! :L:L
Where can one purchase laser diode modules?
One can purchase laser diode modules on select places around the Hong Kong. OPELUS is the best place to purchase laser diode Modules, Infrared Laser Module, Green Laser Module etc.
What is infinite resistance in a circuit?
It isn't. If you're using superposition, you open circuit current sources and short voltage sources; this is because the current source declares the current that will be flowing through that branch.
Both current and voltage sources have a finite internal resistance.
As the DC voltage applied to a circuit decreases what will the current do?
In a passive circuit, the current will decrease.
In an active industrial circuit, it will usually decrease.
In a theoretic manner - it is an unknown.
What are the disadvantages of having an analog watch?
The advantages of an analog watch over a digital watch are that analog watches can be more durable in some facets, than a digital one. Many watch enthusiasts also feel that analog watches are more aesthetically pleasing than digital watches.
Sky plus or sky+ is a personal video recorder service for the British Sky Broadcasting in the United Kingdom. Its functions include recording, pausing and even instantly rewinding live TV.
What devices uses anolog signals?
Generally process control devices use analog signal. Normally in an industrial automation setup, 0-20 mA (mili amp) or 4-20 mA or 0- 10 Volts are used. These signals are used for both providing control output and to provide feed back signal (say to a PLC (programmable logic controller) or DCS)
Example for a control out put is a motorized damper operated by 4 - 20 mA signal. PLC provides 4-20 ma signal. Example of a feed back signal is 4 - 20 mA signal from temperature transmitter, measuring a liquid temperature to PLC as input.
Why capacitor charges to 63 percent in time constant?
There's a certain number that keeps popping up in math, physics, chemistry, electronic,
and engineering things. It shows up wherever the speed of something depends on
how far it still has to go to the end.
It's another one of those so-called 'irrational' numbers, that can't ever be written
exactly with digits, so it's represented by a symbol. It's roughly 2.71828... and it's
usually called ' e '.
-- If something starts out high and starts dropping toward zero, but the closer
it gets to zero the slower it goes, then its value at any time is
(original value) x e-(time it's been falling/some number)
-- If something starts out at zero and starts rising toward a target, but the closer
it gets to the target the slower it goes, then its value at any time is
(target value) x (1 - e-[time it's been rising/some number] )
You can see the ' e ' in both of those situations.
The quantity that I called "some number" in both situations is called the "time constant"
of the situation. That's really the number that tells how fast the whole thing is
going to happen.
-- The time-constant is the length of time it takes for the process to advance
to the level of 1/e of the total distance it still has left to go.
-- 1/e is about 37% .
-- So the time constant is the time it will take, from right now, to cover
about 63% of the distance it still has left to go to the end.
At what end of the ohm's scale are resistance measurements more reliable?
Answer: At the zero end, the measurement is more reliable, because all materials have some conductivity, so even the plastic grip of a meters probe, with both your hands making contact with both the probes, will give you some reading at infinity side of the scale.
Why is a low voltage shock more dangerous than a high voltage shock?
LOw voltage shocks aremore dangerous than high voltage shock because at low voltage the electrical source pumps a lot of energy through the body for a longer time damaging vital organs. where as high voltage shock cause a layer of burnt insulting tissues which limits the current that flow through the body there by causing lesser damage.Also low voltage shock tend to 'stick' to the body while High voltage shock tend torepell the body causing superficial burn close but not close enough at low voltage your body react NOT with extreme convolsions therefore you are there to the end. at hi voltage your body will widly shake maybe to the point of disconnection. it is not the voltage that kills but ruther the current. a 2 v battery can killyou if it gets to your blood supply [SODIUM] METAL GOOD CONDUCTOR A 'D' CELL CAN DO IT ON A SHORT IT CAN DRAIN 2 AMPS ENOUGHT TO KILL ANYBODY.
