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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 are two uses of capacitors in an ac circuit?
power factor correction, and sometimes it is necessary to place capacitors in series with a line to counteract the natural inductance of the line - this allows more power to be transferred through that line.
What is the total voltage of a fully charged battery?
This depends on the actual battery and what it is made of.
A 1.2 volt rechargable NiMh battery typically gives off a voltage of 1.3 to start with, then it rapidly goes down to 1.2 volt where it stays stable until almost empty, then it quickly drops below and down to .5 volt or even further down..
The same applies to Lead Acid or NickelCadmium batteries.
Different types of batteries have different properties.
NickelCadmium normally are able to give a lot of current until empty.
where as the current you get from a NiMh battery is rather limited.
Lead Acid are capable of a very high current but still dependant on the internal design of the battery.
Unfortunately one can not give a correct (for all) answer to a general question.
Regards.
What are the factors causing a permanent magnet generator not to generate emf?
A magnetic field will not generate an EMF if there is no motion, so the primary factor causing a permanent magnet generator to not generate EMF is if it is not turning.
What is difference between an AC and DC flux?
As happens with voltage and current, flux is steady for dc but keeps altering for ac.
A transformer works through the ac flux in the magnetic core.
1 Which type of noise is most difficult to remove from digital signal?
Impulse Noise is the a noncontinuous noise and one of the the most difficult errors to detect because it occurs randomly. Like a lighting strike, the severity of the static across the radio could be so severe that you couldn't hear the music or like a vinyl record with a scratch, the pops and clicks associated with the hitting the scratch making the sound at that exact moment unrecoverable. Typically though, the impulse noise is an analog burst of energy.
If 10 coulombs of charge passes a specified point in 2 seconds how much current is flowing?
10/2 = 5 coulombs per second = 5 amperes.
What are the characteristic of photo diode?
A photodiode is a type of photodetector capable of converting light into either current or voltage, depending upon the mode of operation. Its characteristics is same as that of an ordinary diode, except that it depends on light.
What is circuit that is complete and unbroken with flowing electric current?
Yes, as long as the unbroken path is a good conductor of electricity.
How do you make a walkie talkie?
Each radio needs a receiver and a transmitter. When the push-to-talk button is not depressed, the radio receives. An optional squelch circuit can be used to mute static. When the push to talk button is depessed, the receiver is muted and the transmitter is activated. The details of this are left as an excercise to the reader. To make a radio, you may need a crystal diode.
The main advantage is that the 74ls193 can count either up or down, where as the 74ls163 can only count down.
However, if you are asking about the 74ls93 instead of the 74ls193, the 74ls93 has a divide by 12 counter which the 74ls163 does not, but the 74ls93 isn't a synchronous counter so I assumed you meant the 74ls193.
How far does DC voltage travel?
DC Voltage is kind of like water pressure. It needs a conductor (usually a wire) in order to travel. The same way you need a garden hose to carry water pressure. Voltage will drop due to resistance in a very long conductor if a significant current is being drawn.
How is input and output is similar?
Input is where you add somthing eg.) a picture and output is sending it to someone.
What is the difference between DC and AC?
The primary difference between DC and AC is the direction of current flow. In a DC circuit, all electron current flow is in one direction. In an AC circuit, current flows in one direction for part of the time, and in another direction for another part of the time. In the AC circuit, we'll see current flowing "back and forth" instead of the unidirectional current flow we find in a DC circuit.
DC is "Direct Current", and AC is "Alternating Current". In DC, the current flow is in one direction only. In AC, the current flow is constantly changing direction.
An example of DC is the output of a battery. An example of AC is the power present in a home electrical system.
The current whose magnitude and direction remains change called as alternating current.
The current whose magnitude and direction remain unchanged called as d.c. Current.
Advantages and disadvantages of embedded system?
An RTOS is not required for an embedded system but it can offer powerful advantages to the system developer. Without an RTOS the developer must write his own code to handle all of these functions.
- Enables real-time, deterministic scheduling and task prioritization
- Abstracts away the complexities of the processor
- Provides a solid infrastructure constructed of rules and policies
- Simplifies development and improves developer productivity
- Integrates and manages resources needed by communications stacks and middleware
- Optimizes use of system resources
- Improves product reliability, maintainability and quality
- Promotes product evolution and scaling
A well-architected RTOS will handle these functions much more efficiently that a programmer could write the code. RTOS developers are expert in how to handle operations with a minimum of processor cycles.
What happens in a short circuit occurs in an electric circuit?
A short circuit is a condition whereby a point or section of the circuit offer a short path for current to return to the power supply. It occurs when two or more points or sections of the circuit touches each others (but only and only if that results in drop in resistance to such an extent that it causes excessive current to flow through.
What is resonance frequency in electronics?
The frequency at which the impedance of the circuit becomes zero is known as resonance frequency.
Actually at resonance resistance only presence in the circuit. That means the impedance of the inductor and capacitor will automatically vanish.
My husband is a heating and air tech and he checks and starts up air conditioners in all kinds of weather.
Multimeter measure current in amps volts or watts?
A multimeter measures current in amperes and potential difference in volts. Wattmeters are used to measure watts and the reading is a combination of current being drawn and the voltage applied. watt = volts x amps
What are the types of noise which can occur in an electronic circuit?
THERE ARE MANY TYPES OF NOISE SUCH AS SOFT ,HARD,POLITE etc SOFT NOISE MEANS VERY LITTLE SOUND THAT COMES TO OUR EAR VERY SMOOTHLY. HARD NOISE MEANS VERY BOOMING VOICE THAT COMES TO OUR EAR VERY HARDLY (VERY LOUD). POLITE NOISE MEANS VERY CLEARLY AND LITTLE NOISE MEANS SOFT
What are the factors determining the size and direction of a generated emf?
There are three factors for determining the size and direction of the emf generated from an AC generator. the strength of the magnetic field, the size of the field, and the speed of the rotation combine to determine this.
What are the electrical appliance that use AC?
Neither.
AC is alternating current
DC is direct current
Either can be large or small
The transmission losses are greater for (non superconducting) DC power so in most applications the absolute value of DC current will usually be lower than those in AC systems.
