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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 is the function of test pen for electrical wiring installation?
It is a device that senses the presence of a voltage potential when the pen is in near proximity to the voltage source. It is used to make sure power is turned off before working on wiring.
What does a thermistor do that makes it different from a thermocouple?
- a thermistor is a temperature sensitive resistor - to measure temperature you must measure its resistance and convert that resistance to equivalent temperature
- a thermocouple is a temperature sensitive voltage source(i.e. battery) - to measure temperature you must measure the voltage across it and a reference thermocouple at a known constant temperature connected in series with it and convert that voltage to equivalent temperature
Can a DC motor be turned into a welder?
A dc is an acronym for direct current & 2 be put in to use,changed to ac which could then be used in welding
What is the effect of temperature on PN junction diodes?
As temperature rises more minority carriers are created, causing leakage across the junction to rise. This can cause runaway and eventual destruction of the junction.
How do you test a dc motor with a mega meter?
A megameter, or a Megger as it is commonly called, is used
to measure the insulation resistance of cables and other
electrical equipment. The measured value is in mega ohms.
Hence the term Megger.
Most meggers generate 500 Volts DC supply, but their
current capacity remains low.
When the two terminals of a megameter is connected to
across the equipment to be tested, the high voltage gets
leaked into the equipment. The resistance is inversely
proportional to the current flowing through the equipment
under test.
Originally, most meggers were analog in nature, and were
generating high voltage using a dynamo, when the lever is
rotated at high speed.
Today most meggers available are digital, and can
generate 500 volts as well as 1000V. Some meggers have
winding resistance testing facility as well, and hence can
be used as a single tool to test the resistance of a motor
in ohms as well as in Megaohms.
Meggers used for checking high resistance like that of
mains transformrs, generate much higher voltages and are
generally analog type.
A frequency-modulated oscillator is usually called a sweep generator today, but in 1935, it was called a wobbulator.The first wobbulators used a motor-driven variable capacitor to sweep (or wobble) through the desired frequency range. Later circuits used a Phantastron oscillator that worked well, but still had no good way to add markers.
The noun definition according to the online dictionary: 1. Its the 'line' that is formed by sewing together pieces of cloth. 2. Its the stitches used to make such a line. 3. Its any line formed by abutting edges. Also in knitting its the line formed by purling.
When did transistors replace the vacuum tube?
A Transistor is an electronic device which amplifies electrical signals, or acts as a switch. Most of the research on Transistors was performed by Shockley in 1947. That was when, the advantages of the solid state device similar in function to a Triode Vacuum tube were understood and implemented. The basic advantage was compactness..
802.11g
Capacitor can not work in DC signal?
For dc voltage signals, a capacitor is an open circuit.
Current flow into a capacitor is proportional to variation of voltage (I = C dV/dt).
So, if you polarize a capacitor with constant voltage, there won't be current flow.
Instead, if you impose constant current, capacitor voltage will grow linearly (as a proof, you can integrate V-I formula with respect to time).
An analogy can be found with hydraulics: current is water carrying capacity, voltage is water height (relate to potential energy) and capacitor is like a lung (i'm not sure about this term, it's a sort of elastic balloon full of water that squeezes and provides water when pressure falls down; when pressure comes up again, it recharges itself: it acts as water pressure stabilizer).
From what I understand, and have read on some vendor websites, the coating that gives the bubble wrap its antistatic properties is only guaranteed for 6 months. This suggests that the coating is removed during use. I, personally, advocate using the bubble wrap once for antistatic properties. D. Murphy (ESD Co-ordinator)
What is the difference between electric and electrical?
Pronunciation. An electrical circuit is the exact same as the electric system.
We picture the cell as its Thevenin equivalent ... an ideal voltage source ' V ' in series with an internal resistance ' R '. You're asking for the value of ' R '.
With the 2-ohm resistor: I = V / (R + 2) = 0.9 ===> V = 0.9 (R + 2)
With the 7-ohm resistor: I = V / (R + 7) = 0.3 ===> V = 0.3 (R + 7)
Since ' V ' is constant, 0.9 (R + 2) = 0.3 (R + 7)
0.9R + 1.8 = 0.3R + 2.1
0.6R = 0.3
R = 0.3 / 0.6 = 1/2 ohm
We can confirm this result either by substitution or by measuring the cell open-circuitly. It should be 2.25 volts.
It's an IC where the input is a 3 bit binary number. The output has 8 pins, one for each of the possible input values. For example, if the input is 000, the output pin called Y0 will the activated because that cooresponds to zero while all other pins will stay the same.
What is the ideal sampling frequency?
Not less than double the highest frequency component of the signal you're sampling.
yok dayı yok raad ol benim sülalem raad.
Why deflection is necessary in cathode ray tube?
It is not necessary in a cathode ray tube, it is a side effect and is needed in the calculations to ensure that there are no errors.
How do you give Vote of thanks for training program?
Giving a vote of thanks for training program is not very complicated. You should find the relevant parties to thank from the trainers, trainees, hosts, sponsors and any other party that has played a part either directly or indirectly to make the training program a success.
Conception or image created by the imagination and having no objective reality .
What objects work with dc current?
Things that need a battery in order to work, must need Direct Current at some point, if not all, for it to work. eg a hand torch.
