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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 does an amplifier do to a small input signal?
amplifier will strengthen da small input signal n amplifies it
A Gauss Meter, or magnetometer, is an electronic device that is used to measure the strength of magnetic fields. Gauss Meters are commonly used to measure the strength of magnets and magnetic effects in electronics. They can also be used as metal detectors.
Can you clean circuit boards with white spirit?
They are too delicate use canned air like they make for keyboards.
What will happen to the resistance and the brightness if you add a light bulb to the circuit?
If a rheostat is connected in parallel with a light bulb, the setting of the rheostat
should have no effect on the performance of the light bulb, as long as the power
supply is able to maintain its output voltage and deliver the current demanded by
their parallel combination.
Why if one branch in a parallel circuit is shorted all others will short?
A current checks less resistance path to flow. When one of parallel branches is shorted, it becomes have less resistance and whole the current will flow through it, means current before parallel branches and current after parallel branches becomes same, and all branches become short.
yes. in many ways. the length of a wire effects total circuit resistance, and in the audio world it effects final phasing. if a wire is too long it will have higher resistance and will not be capable of supplying enough current for the load. a simple fix to this is to go a size larger than you think you'll need and you will be better off if you are making a long stretch with that wire.
Why local oscillator frequency are higher than signal frequency?
It doesn't have to be; you can do it either way.
If it's part of a transceiver, then the LO is usually placed on the side of the Rx freq that's
opposite the Tx freq, so that leakage from the Tx oscillators can't produce Rx phantoms.
Another thing to watch out for ... depending on the Rf band and the IF, you wouldn't want
the LO to ever operate AT or near the IF frequency. That could really play havoc with the
Rx discrimination.
For example ... an old AM radio, covering 0.55 to 1.6 MHz, with an IF of 0.455. If you put the
LO on the low side, then at or near 910 on the dial, the LO runs at 455 to produce an IF at 455 !
There's this loud LO blasting out at 455, while the IF strip is trying to work with this tiny received
signal at 455 at the same time. Not good.
current in series depends on values of resistors. more resistance less current will flow through and viceversa
Why p type semiconductor has majority charge carrier as hole?
The majority carrier in p-type semiconductor is the hole. Electron carriers in p-type semiconductor are minority carriers. Minority carriers in any semiconductor are produced mainly by heat. Only at absolute zero temperature would there be no minority carriers.
Why germanium and silicon are considered as best semiconductors?
actually diamond should be much better, if fabrication issues can be solved, it is faster and will operate up to 600ºC junction temperature. Silicon is limited to 150ºC junction temperature and Germanium is limited to 50ºC to 60ºC. Germanium was originally used because it was easiest to purify and process. Silicon is the cheapest material now, it comes from sand and there is no shortage of that.
How do you write out an equation used to find the inductive reactance ant the capacitive reactance?
Xc(capacitive reactance) = 1/(2piFC)
XL(inductive reactance) = 2piFL
Where pi=3.14etc.,
F=frequency and C and L are capacitance and inductance.
Please pardon lack of proper symbology.
A device that decreases voltage?
Step down transformer, potentiometer or rheostats can all be used to reduce voltage.
What are the advantages of implementing 74LS193 over 74LS163?
Primary disadvantage: it is old technology (1986) and unless it is one of the only ICs on the circuit board, a much better option is to select a programmable device (CPLD, FPGA, programmable microcontroller, etc).
Other disadvantages:
-draws a large amount of current: not suitable for portable devices
-has a fixed operating voltage of 5V
-has ambient temperature limitations
-has poor switching characteristics
-large sized package
-can only count up
What kinds of frequencies can be blocked by using a band pass filter?
A band-pass filter blocks or attenuates frequencies outside of a certain range, while it accepts frequencies from within that range. The range of frequencies it will accept is determined by its Q-factor. A filter with a high Q-factor will have a narrow range of accepted frequencies, whereas a filter with a low Q-factor will have a wide range of accepted frequencies.
Does voltage flow in a circuit Explain?
Voltage in an electrical circuit is the rough equivalent of pressure in a water pipe.
It causes the electricity to flow. Higher voltage; more flow.
The difference is that you can think of pressure applied at a single point, but
voltage is always the difference in electrical potential between two points.
That's how a bird can stand on a 7,000-volt rural electrical line without harm.
The potential difference (voltage) between the line and the ground is 7,000 volts,
but the potential difference (voltage) between the bird's two feet is very tiny.
How do you calculate a starting current?
The formula for the electric current can be given as I= Qt where Q refers to coulomb charge and t= amount of time in second . By applying this formula the amount of current passing through the conductor can be known foor any instant of time. For any conductor the amount of charge is always constant.
Current measures the flow of moving charge per unit time. Therefore the formula for current is I=Q/t as the unit of current is C/s (Coulomb's per sec) or amps (A).
The term, 'null', simply means 'none' -so, 'null voltage' means 'no voltage'.
Most bridge circuits require you to achieve a 'null reading' on its measuring instrument, when using the circuit to determine resistance (in the case of the Wheatstone Bridge), etc.
When the distance between the plates of a capacitor decreases what happens to the capacitance?
-- it has larger capacitance
-- it can store more charge at the same voltage
-- it can store more energy at the same voltage
-- it has lower capacitive reactance at any given frequency
-- in combination with a given resistor, the cut-off frequency of a high- or low-pass filter is lower
-- in combination with a given inductor, their resonant frequency is lower
What components can be include in integrated circuits?
Except coils (inductance) all other active and passive devices could be included in an ic
What is function of snubber circuit?
capable of resetting the transformer as well as eliminating leakage inductance voltage spike across the switch
A Jfet works by applying voltage to the drain of the jfet. A jfet will then conduct across from drain to source.
What is a typical sign that a capacitor is bad or has failed?
Bulgy and hot in tantalum total visible destruction
What is the use of tri gate transistors?
Tri-gate transistors, also known as FinFETs, are used in modern semiconductor technology to improve performance and reduce power consumption in integrated circuits. Their three-dimensional structure allows for better control of the channel, which enhances electrical characteristics like switching speed and leakage current. This makes them ideal for scaling down transistor sizes in advanced nodes, enabling smaller, more efficient chips for applications such as mobile devices, high-performance computing, and data centers.
