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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
You can not keep the voltage constant while increasing or decreasing it!
CommentAn additional point worth making is 'voltage' doesn't 'flow'. By definition, it is the potential difference between two points.What happened if the DC voltage in the clamping circuit is replaced by an AC source?
we will get rectified voltage at the output.in case we replaced the DC source with AC source
WHAT IS Salary of electronics and communication engineer IN USA?
average $7500 per month
In industry $9000 per month.
There will be 20 amps flowing through the 5 ohm resistor. We could do some math and all to figure voltage drops and some other things, but let's cut to the chase and see what's happening. Based on what we know about series circuits and about parallel circuits, we can shred this in nothing flat. So let's. First, we're told 30 amps flows in the circuit. That's the total current, and it will be the current through the first 10 ohm resistor. It has to be. The the 30 amps "splits" to flow through the parallel network of the 10 ohm and 5 ohm resistors. That's 30 amps that has to "split" and some will go through the 10 ohm resistor and some will go through the 5 ohm resistor. With me? Sure. Now for the "trick" here. Since the 5 ohm resistor has only half the resistance of the 10 ohm resistor, twice as much current will flow through it as the 10 ohm resistor. Make sense? Yup. Let's finish this. Since there is twice as much current flowing in the 5 ohm resistor 'cause it's got half the resistance of the 10 ohm resistor, if we have "x" amount of current flowing in the 10 ohm resistor, then we'll have "2x" amps of current flowing in the 5 ohm resistor. That's "3x" amps total, and the "3x" amps equals 30 amps. See through it now? There will be 10 amps flowing through the 10 ohm resistor, and 20 amps flowing through the 5 ohm resistor. Piece of cake.
What elements determine the overall voltage gain of a common emitter amplifier?
A: Ico is directly related to temperature that is leakage that will offset the loading point .
What is the power dissipated by a parallel resistor of 100 ohms with a 40v power source?
You may find it helpful to use Ohm's law and the definition of electrical power.
What is the effect of dielectric on the capacitance of a capacitor?
Any variation of the charge within a p-n diode with an applied voltage variation yields a capacitance wich must be added to the circuit model of a p-n diode. The capacitance associated with the charge variation in the depletion layer is called the junction capacitance, while the capacitance associated with the excess carriers in the quasi-neutral region is called the diffusion capacitance. Both types of capacitances are non-linear so that we will derive the small-signal capacitance in each case. We will find that the junction capacitance dominates for reverse-biased diodes, while the diffusion capacitance dominates in strongly forward-biased diodes. The total capacitance is the sum of both.
What was responsible for improvements in radar and sonar?
No one individual was responsible for improving both (or even either) technology. Radar and sonar were worked on by many investigators over decades to bring them along to the point where they are the effective, reliable tools we look to as we attempt to look at things in the sky, below the water and in the ground. What is arguably the most effective technology in bringing radar and sonar forward is the advancements in electronics, and in computer technology.
A diode blocks current flowing in one direction, and passes a current going into the other direction (with a little potential energy loss).
DC is a current flowing into one direction all the time. therefore if you put a diode in a dc circuit it will either always block or always let it pass (provided a certain amount of supply voltage).
if you have an ac circuit the current alternates (ac=alternating current) most of the cases the current flows half of the time in one direction and half of the time into the other direction. so you will have both cases 50% blocking 50% passing through.
so if you put an LED into an ac circuit, no matter what way you put it in you will always see light.
What is the benefit of using zero ohm resistor?
A: Extremely important since at the level there is infinite current available at zero volts, In reality it can never be ac hived but it can be assumed for consideration
Each piece of hookup wire can be thought of as a zero-ohm resistor. In fact even the hookup wire has resistance but it's so small it it can be neglected.
What is true concerning a simple electric circuit?
The simplest form of an electrical circuit is when an energy source (such as a battery) is connected to a load (such as a light bulb or a resistor). The connections must be made in such a way as to allow the energy to flow from the source, through the load and back into the source to form a loop.
What are the types of analogies?
KINDS OF ANALOGY
antonyms
part of the whole
purpose
action to thing
synonyms
class and member
worker and workplace
KINDS OF ANALOGY
antonyms
part of the whole
purpose
action to thing
synonyms
class and member
worker and workplace
What is the Difference between half wave and full wave rectification?
A half wave rectifier is a special case of a clipper. In half wave rectification, either the positive or negative half of the AC wave is passed easily, while the other half is blocked, depending on the polarity of the rectifier. Because only one half of the input waveform reaches the output, it is very inefficient if used for power transfer. Half-wave rectification can be achieved with a single diode in a one phase supply.
In half wave rectification, either the positive or negative half of the AC wave is passed, while the other half is blocked. Because only one half of the input waveform reaches the output, it is very inefficient if used for power transfer. Half-wave rectification can be achieved with a single diode in a one phase supply, or with three diodes in a three-phase supply.
in half wave rectifier only one diode is there. The diode will be forward biased in the positive half cycle and reverse biased in the negative half cycle. So the out put will be available only during the positive half cycle and the out put will be unidirectional.
Full-wave rectificationA full-wave rectifier converts the whole of the input waveform to one of constant polarity (positive or negative) at its output. Full-wave rectification converts both polarities of the input waveform to DC (direct current), and is more efficient. However, in a circuit with a non-center tapped transformer, four diodes are required instead of the one needed for half-wave rectification. (See semiconductors, diode). Four rectifiers arranged this way are called a diode bridge or bridge rectifier:For single-phase AC, if the transformer is center-tapped, then two diodes back-to-back (i.e. anodes-to-anode or cathode-to-cathode) form a full-wave rectifier (in this case, the voltage is half of that for the non-tapped bridge circuit above, and the diagram voltages are not to scale).
In a full wave rectifier during each half cycle one of the diode will be forward biased and output will be available across the load resistor. So we get continuous dc output throughout the cycle.
- no.. of diods 1 in half wave rect....
When the forward saturation in Bipolar junction transistor occurs?
Forward saturation in a BJT occurs when the ratio of collecter-emitter current and base-emitter current reaches hFe or dc beta. A that point, the BJT is no longer operating in linear mode.
What is the instrument called that can change electrical voltage?
Electrical voltage can be changed by a transformer.
Can a 6 volt battery light up a 4 watt bulb?
More voltage than required will light something such as a bulb.
However, you have to consider such things as bulb longevity. Anything over 12 volts will illuminate a 12 volt bulb. If it's connected to an engine alternator and not a pure clean 12 volt power supply, ideally 13.5-14 volts is the voltage you're looking for to power this bulb.
16 volts will work, but it may prematurely burn the bulb out.
That is, unless it is an LED. Even overpowered they will continue to burn bright, but not burn out, but it won't last as long as if it were connected to a true 12 volt supply voltage. But in the end, even an overpowered LED will last longer than an overpowered 12V incandescent bulb.
It will definitely burn out prematurely if a higher than design intent voltage is supplied, however the hours. minutes, seconds lost may not be as high as people may assume them to be, from 12v to 16v is not such a jump especially in light of most automotive applications having output voltages up to 14.8v a car battery typically has 6 x 2.2v cells making 13.2v
What is the color code for a 8 ohm resistor?
Green - Black - Red, but this is not a standard value. You probably want a 5.1K resistor, and that is Green, Brown, Red
disadvantages:
1.It has limitations on the size of data. 2.Most Microprocessor does not support floating-point operations. 3.over heating physically, 4. not bit addressable,
What is time constant in RC circuit?
The time constant is precisely the product R times C. The result of this product will be a time; it represents the time for the capacitor to discharge to about 37% (1/e, to be precise) of its initial voltage.
Why does a square waveform require more bandwidth then a sine waveform for transmission?
A sine wave is used for transmission - and not a square or triangular wave - because a sine wave is the most efficient waveform to use and also because it can be generated using normal copper windings in alternator rotors and stators without needing much, if any, "wave shape improvement" equipment.
The deliberate production of either square or triangular waves would waste a huge amount of energy, both in the power generation plant and in the many transformers used in the power distribution network. Read some Electrical Power Technology books to find out more!
What is the function of the connectors for the integrated peripheral on a motherboard?
The purpose of a 4-pin auxiliary connector on a motherboard is to provide an additional 12V power supply to the processor.
What effect will be produced on a capacitor of the separation between the plates is increased?
Nothing until the potential difference produces an electric field stronger than the insulation in the capacitor can take. Then it will spark over. For an air capacitor that is approximately 33,000 volts per centimetre in dry air, so for spacing of 0.25 mm the sparking voltage would be around 700-800 volts
Does more current flow into a light bulb than out of it?
No. Although there is a voltage drop across the filament of an incandescent light bulb, the amount of current flowing out is identical to what flows in: current in = current out. That is an important fact to always keep in mind when solving simple electrical circuits: the sum of the currents flowing into a node equals the sum of the currents flowing out of it.
we use to connect elcb using hands. with help of skrewdriver
