0
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 difference between PTC and NTC resistors?
positive temperature coefficient vs. negative temperature coefficient
resistance increases or decreases with increase of temperature, respectively.
Well, discovery of the diode is a many forked question.
The principle was discovered in 1873 and later noted by Thomas Edison, but no practical use was given the device until Flemming patented it in 1904.
When resistors are put in series next to each other their overall resistance is?
Rtot=R1+R2, considering R1 in series with R2
Why capacitor reduce gain of ce amplifier?
Where is this capacitor in the circuit?
- A capacitor across the emitter bias resistor actually increases the AC gain because it bypasses that resistor, by increasing the ratio of collector impedance to emitter impedance which determines the amplifier voltage gain.
- A capacitor across the base input resistor actually increases the AC gain because it bypasses that resistor, by decreasing the attenuation of the input signal by the input circuit network.
What the need for amplifiers used in biomedical applications?
Amplifier is a electronic device. It is a combination of transistors & FET. To give an input signal to an amplifier, it does not change the value of frequency & waveshape .It increase only the value of amplitude.
What is the stuff that leaks out of capacitors?
It is called SMOKE, because when they blow up, you let the smoke out!
What is the difference between amplifier and rectifier?
A Re generator is a a circuit that repeatedly supplies current to a memory or display device. A amplifier increases the amperage of a signal or current.
What is difference between impedance and reactance?
Impedance is the net reactance(for Capacitors and inductors in the circuit) / Resistance of the circcuit whereas reactance is the prperty of the individual passive components ( only capacitors n inductors) to resist the flow of charge.
Block diagram of satellite earth station?
This website: www.satprof.com/engineering.html has a block diagram of the satellite Earth station. To view the diagram just visit the website and click on Satellite Earth station.
A coulomb is a measure of whereas an ampereis a measure of?
A coulomb is a unit for measurement of electrical charge and an ampere is the unit used for measurement of electric current.
What is the difference between digital multitester and digital multimeter?
An analog multimeter measures values directly and is displayed using a meter. calibratin is done manually by adjusting the meter needle. A digital multimeter collects data at discrete times and the display is usually through LEDS. There is a bandwidh limit and calibration is often done with a click of a button which is much simpler compared to manually tuning the needle on an analog device
Which university is the best for undergraduate in telecommunications Engineering?
university of Russia
What are the frequency determining components in a phase shift oscillator?
The frequency determining components in a phase shift oscillator are the series of resistive/capacitive filters on the output of the inverting amplifier. See accompanying link.
What are the different types of capacitors?
Ceramic capacitors, film capacitors, multi-layers ceramic capacitors, electrolytic capacitors, mica capacitors, super capacitors, etc.
-- We're JYH HSU(JEC) Electronics Ltd (or Dongguan Zhixu Electronic Co., Ltd.), an electronic components manufacturer. You may google search "JYH HSU" to find our official website.
4.5 volts in series; 1.5 volts in parallel.
How do you determine ampere hour for two 12v dc batteries?
To determine the ampere-hour rating of a battery, read the label on the battery or consult the manufacturer's specifications for the battery. That is the best way. It is also possible to measure it, but you will be using up capacity on the battery and, if it is non-rechargeable, that will exhaust the battery.
First, decide what the discharged state is. This could be a certain voltage under load, the inability to provide a certain current, or (best in the case of a lead-acid battery) the specific gravity of the electrolyte. In a typical 12V lead-acid battery, such as in an automobile, the discharged voltage is around 10.5 volts under load. {This writer does not know the specific gravities involved - someone else, please feel free to refine this answer.}
WARNING: batteries generally emit explosive gases when being charged or discharged. Take necessary precautions, and vent the battery as needed.
Starting with a fully charged battery, draw a load of some current, and find the current that will discharge the battery in eight hours. Start low, unless you have some idea of the projected rating. If the projected rating is, for instance 80 ampere-hours, draw 10 amperes.
Recharge and repeat as needed to obtain a statistically consistent result.
When you have the amount of current, say 15 amperes, that will discharge the battery in eight hours, multiply that number by 8, in this example giving 120 ampere-hours.
The reason for multiplying by eight is that is the convention for reporting a battery's capacity. You say "120 ampere-hours at an 8 hour rate", which simply means 15 amperes for 8 hours. If you were to actually pull 120 amperes, the battery would discharge in less than one hour, and if you were to pull 1.5 amperes, the battery would discharge in greater than 80 hours.
SnO2, Tin Dioxide, is not an alloy. It is, however, the main ore of Tin (traditionally called as cassiterite). Tin Dioxide can be hydrated to yield "stannic hydroxide" or "stannic acid" since tin is amphoteric (ie., can act as base or acide).
Alloys are solid solutions of metals (and not usually their oxides or other compounds).
Insulation tests inserts high voltage DC across what ever is being tested. This voltage could be higher that the diodes peak reverse voltage. The diode might bridge across the PRV rating using a voltage higher than its normal operating voltage and destroy the diode. All variable frequency drives and soft starts will have a label on them warning against preforming this type of test with this type of equipment in the circuit. Disconnect the load from the drives when meggering a downstream load.
Is there any signal with infinite energy and zero power?
sadly no. but we are coming close to it here in Yale with our science lab experiments. drop by if you can.
