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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
Difference between noise and interference in optical communication?
Interference and noise are distinguished the same way in all situations not just optical communication. Noise is caused by random thermal effects or statistical effects to to the randomized distribution of electron flow. Interference is due to a system being sensitive to external perturbation, due to weather, dust, vibration etc.
Why are analog waveforms sampled 8000 per second?
That is what that piece of equipment samples at. Others can sample at billions of samples per sec. It all depends on the A/D sample rate that was picked.
agree
How is the resistor behaved at high frequency?
The major problem with resistors at high frequencies is for wire-wound (power) resistors, that will act as inductors at high frequencies. In addition, very small resistors, like chip resistors, can also exhibit capacitive effects. Special high frequency resistors are designed to offset these effect.[1]
An ammeter has a finite resistance which is inserted in series with the rest of the circuit, increasing the total resistance and decreasing the current. A good ammeter has a very low resistance, so it shouldn't affect the circuit noticeably.
How many paths are there in a parallel circuit?
At least two paths. Current will divide between them according to their relative impedances.
How can you tell whether current is going into or out of a node in a circuit?
When you add up all the currents going into and out of a single node, you have to wind up
with zero, or else you made a mistake adding them up.
multiplexer is a device thet convert all inputs into a single output
A capacitor stores electrical charge. When the device is shut off, the charge will - over time - slowly bleed off. But immediately after shutdown, the charge is still present in the capacitor. In large capacitors, such as those found in air conditioning units, older style televisions, and microwave ovens, the stored charge can be strong enough to be potentially lethal. Service technicians have safe procedures for bleeding off the capacitor charge, but those not knowledgeable about electrical systems should not touch a chassis of above-mentioned items, even if shut off and unplugged. Stickers that say "Danger - High Voltage" mean exactly what they say.
Another Answer
A capacitor does NOT store charge; it stores energy.
The net charge on the plates of a capacitor is no different whether it is 'fully charged' or 'fully discharged'. It does not take charge from the supply and store it on its plates! It simply allows electrons from one plate to be transferred to the other, so there is no change in the overall amount of charge.
What it does do is to store energy, expressed in joules.
How do you get your account number for boost mobile?
You have to call customer service:
Business hours:
Mon-Fri: 4am - 8pm PST
Sat & Sun: 4am - 7pm PST
General Support:
1-866-402-7366
What do you adjust to altar the current in a circuit?
i'm not sure what kind of a question u r asking about.
*you kan simply use a resistor to reduce the magnitude of the current.
*If you want to change the phase angle of current, u kan use a capacitor or an inductor
*If u want to increase the current just use a step-down transformer. Note that I increases while the voltage decreases.
*Or more electronically, u kan use "buffer circuits(Unity gain amplifier/voltage follower)".... U kan build a small buffer circuit by LM741 operational amplifier IC....
or better to go for ULNxxxx (e.x.ULN2003) TTL IC for better results having about 8 buffer circuits.
However think about the application first!!!
What is the Future scope of mini project on automatic room light controller with visitor counter?
the power can be saved
Not really, unless you have a capacitor start type of motor. Capacitors can be very hazardous if improperly connected to mains power and I wouldn't suggest your trying it if you're not experienced or qualified. Best bet is just to get a heavier swicth or use a heavy duty switching relay.
What is the Baud rate for 1024QAM?
It is impossible to answer that question.
On the other hand if you assume this:
- Baud rate = symbol rate
- Bit rate = bits per second
The following formula is valid:
Baud rate = bit rate / 10
If 1024 QAM is used.
Due to a phenomenon called electromagnetic induction, this could ionfact be possible. All it would take is a simple set up to enable the metal to cut through the flux lines of the field rapidly (a simple up and down motion of a metal beteen two north south magnets would do) and an electric charge would be induced in the metal. This charge can easily be dis-charged and thus used to shock someone if it was large enough, so YES; electromagnetic fields or magnetic fields CAN be used to electrically charge metal objects in a home as a harassment tactic.
However, the charge from a simple magnet is to minimal to cause any harm.
What is the output of an RC circuit when the input is a pulse step n square wave?
I think nobody is answering because clarification is needed about what is meant by "a pulse step n square wave"?
ANSWER: If the capacitor is in series and it has a poll up to X volts with a resistor a positive transition on the input will be immediate on the output and return to its previous state by the RC time constant. If the resistor is in series and has a pull up capacitor to X volts then the capacitor will charge at the RC time constant. The response is only evident during transition times not during steady states
The current gain in CE mode called as beta (ß)
Tha current gain in CB mode called as alpha (A)
ß= A/(1-A)
=0.98/(1-0.98)
=49
the current gain is 49 in CE mode
The only way to stop a 4 layers diode that is conducting is by?
To cause a Shockley diode to stop conducting, reduce the current going through it to a level below its low-current dropoutthreshold.
What are materials which are suitable for electronic devices?
there are several type of electronics devices and several type of material used for these devices but material which is used for device should able to full fill the requirement of that device.
for instance
rectifier diode - Silicon
Photo Diode - Germanium
High Frequency devices - GaAs, InGaAs, GaP etc.
Every material has it's own configuration so conclusion is that any one semiconductor material can not used as universal material for all semiconductor devices.
What type of wave is square wave?
- A square wave is the sum of all odd harmonics of the fundamental frequency.
- A sawtooth or ramp wave is the sum of all even harmonics of the fundamental frequency.
