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Because most applcations involve the manipulation of some time-varying signal, be it digital or analog. In order to distinguish the signal from the power supply, the power must not be time-varying (AC). Thus, DC power, which is constant, is used. Have you ever listened to a radio or other amplified audio source and heard an objectional hum? this is AC leaking into the audio stream. It interferes with the signal of interest (the music).
What else can I help you with?
Why do we need DC power supply for electronic devices?
Most active electronic devices (devices that amplify or switch states, e.g. vacuum tubes, transistors) only operate when conducting in one direction. If the current reversed periodically (as it does in AC) these devices would either not work at those times or would do something much different than they were designed to do. Thus DC is needed to keep them operating all the time.
What is the difference between electrical devices and electronic devices?
Electronic devices works on low level dc voltage like 48volts and less than that. We cannot give direct line supply to electronic devices, for this transformer is used to convert ac voltage to required dc level... Whereas in electric devices we can use direct line supply (110V/220V) ac. These devices can also be operates on dc volts but greater than 48volts
What are the three main function of the multimeter?
A typical multimeter can measure: * AC & DC voltage (volt) * AC & DC current (amp) * resistance (ohm)
What are the protective devices incorporated in DC starters?
The No volt coil (NVC) and the Overloadrelease(OLR) are the two protecting devices incorporated in DC starters
What is the difference between electrical and mechanical devices?
Electrical degrees and mechanical degrees in dc motors are related by the equation: Deg(elec) = (Number of Poles/2) *(Deg(mech))
Why do we need DC power supply for electronic devices?
Most active electronic devices (devices that amplify or switch states, e.g. vacuum tubes, transistors) only operate when conducting in one direction. If the current reversed periodically (as it does in AC) these devices would either not work at those times or would do something much different than they were designed to do. Thus DC is needed to keep them operating all the time.
Examples of electronic components?
Many electronics have several components in common. The most common are capacitors, resistors, transformers, and batteries. Others electronic components include antennas, terminals, connectors, and switches.
What is the difference between electronic devices and electrical devices?
All modern day computers are built using electronic or semiconductor processors and components, so these are electronic systems which of course need electrical power to operate but are not in general put under category of electrical devices.
What are the differences between AC and DC cables, and how do they impact the performance of electronic devices?
AC cables carry alternating current, which changes direction periodically, while DC cables carry direct current, which flows in one direction. The choice of AC or DC cable can impact the performance of electronic devices based on their power requirements and the type of current they are designed to operate with. Devices that require AC power will not function properly with DC cables, and vice versa. It is important to use the correct type of cable to ensure the optimal performance and safety of electronic devices.
Can DC current be used in homes?
Yes but for what purpose. Virtually all hpme appliances and electronic devices require ac.
What is the difference between electrical devices and electronic devices?
Electronic devices works on low level dc voltage like 48volts and less than that. We cannot give direct line supply to electronic devices, for this transformer is used to convert ac voltage to required dc level... Whereas in electric devices we can use direct line supply (110V/220V) ac. These devices can also be operates on dc volts but greater than 48volts
What does a rectifier do on a quad?
The primary purpose of a rectifier is to derive DC power from an AC supply. Virtually all electronic devices require DC, so rectifiers find uses inside the power supplies of virtually all electronic equipment.
If an electronic device can be operated by battery or household electricity what would it be considered?
Usually the term AC/DC applies. Sometimes "dual power" might be used.
What is the name of the cylindrical power plug found on electronic devices?
This is known as a Coaxial DC power connector. http://en.wikipedia.org/wiki/Coaxial_DC_Power_Connectors
Which is more useful ac aor dc?
AC and DC current both have useful advantages, depending on what you what to do with it.AC is more useful for sending long distance over transmission lines, as AC can be put through a transformer to change the voltage easily.All electronic devices work using DC only. Batteries provide DC and are readily available or can be created. All electronic devices, when used on a domestic AC supply, have their power converted from AC to DC, either within the device or an external power supply.More devices use DC than AC, but we could not get the power to where it is needed without AC transmission lines. Heavy motors were more efficient when constructed for AC supplies, but these days DC stepper motors are taking over, using electronic control circuits.
What are the different types of power adapters available for electronic devices?
There are three main types of power adapters for electronic devices: AC adapters, DC adapters, and universal adapters. AC adapters convert alternating current from a wall outlet to the direct current needed by the device. DC adapters provide direct current power from a battery or other DC power source. Universal adapters can switch between different voltage and plug types to work with a variety of devices worldwide.
What is an ac transistors?
As far as I know, transistors - and other electronic devices - basically work with DC, not AC. If a computer (for example) is plugged into an AC outlet, some device within the computer must first convert the AC current into DC current, which is then fed to the electronic components.
