Electronics Engineering

load in terms of any electrical machine is of 3 types mainly :-

1)resistive load--it means the load connected is a resistor only.

2)inductive load--it means the load applied is an inductor only.

3)capacitive load--it means the load is capacitor only.

4)also there may be combination of all these types or any two of the above loads like capacitive -resistive load;capacitive -inductive load.

NO LOAD:---

as it is very clear from the word itself that it is no load that means no load has been applied to the machine..i.e.the output terminal of machine is open circuited

FULL LOAD:--

the maximum load value that can be applied to the machine at which it can work without damaging any part of the machine is called machine working at full load

---------mrityunjay pandey

(kiit university ,btech 2nd year)

when the vacuum sucks up things it goes through the tube and into the bag ...Unless you are talking about electronics, then a vacuum tube is used to form an amplifying circuit. Some tubes can emit cathode rays onto a screen (Cathode Ray Tube = CRT) to display a picture and some can function as diodes to regulate current flow.

Yes.

what is weighted codes: The decimal value of a code is obtained summing up the positional values. weghted binary code s are those which obey positional weighting principle. each position of number represents a specific weight. There are millions of weighted code The most common one is 8421 Non weighted codes: This codes are not positionaly weghted. each position with in the binary no is not assgned to afixed value.Examples of nonweghted code is ASCCI, GREY CODE, EBCDIC CODE etc

How many Amps is the fridge pulling? Multiply the Amps by the 120V circuit you're plugging into and you'll get your Watts.

An AC motor is an electric motor that runs on alternating current, like household electricity, as opposed to a DC motor that runs on direct current from a battery.

Most AC motors work from the mains supply, which has a frequency of 50Hz in the UK and 60Hz in the USA.

Other types are available that work like stepper motors and need a specialist supply to run them.

It is very beneficial to have a parallel circuit...

for example:

1. If one light in a parallel circuit goes out, the other light bulbs will remain lit

Whereas if a light in a series circuit goes out, all bulbs will go out

2. If not all light bulbs are needed on, you can turn them off with the remaining light bulbs staying on

Watts or kilowatts are units for measuring power. Specialy by alternating electric curent Watt is only for the resistive component.

No power loss occurs in a ideal inductor or capacitor.

The curent for an given power is minimal when V an I are in fase, when fi is 0, and the powerfactor cos fi is 1.

The generator power is P (VA) = V*I

The active power is Pa (W) = V*I*cos fi

The reactive component Pr (VA) = V*I*sin fi

(see related question)

To be precise, a current doesn't flow - a current "is". Although many people - including myself - often use the informal term "a current flows". The particles that make up the current do flow - or move.

An electrical current involves the movement of some type of charged particles. Often, these are negative electrons, but there are other possibilities, as well, especially positive holes, and negative or positive ions.

You might be asking the wrong question. In North America, utilities deliver 120 volts AC at 60 hertz. This means the voltage at your electrical outlet rises to positive 60 volts and then goes to negative 60 volts. The 60 hertz means this happens 60 times a second.

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If you mean you have an outlet with hot and ground or hot and neutral reversed, you should call an electrician. You can buy a cheap tester that will plug in to show you if you have a receptacle mis-wired this way. If the receptacle has a black and white wire connected, and the black wire is not the "hot" wire, it can be tricky to trace down the problem.

A: ZENERS are nothing else then regular diode that have a very predictable reverse breakdown voltage of xx volts. This voltage can be used to limit the input voltage or regulate on it.

1.) In series if 1 light bulb goes out they all do.2.) For each appliance to operate at its rated power, it must be subject to its rated voltage which corresponds to the value of the supply voltage. A parallel connection ensures that each branch is subject to the same (supply) voltage.

Transistors require semiconductor material to be able to function since a transistor must be able to change it's state of conductivity according to its working conditions. Although many elements these days are involved in manufacturing of transistors. Fundamentally two common semiconductors are described for educational purpose for BJT (bipolar junction transistors). They are Silicon (Si) and Germanium (Ge). Silicon is never intrinsic (pure) in transistors.

To form a p-n-p or n-p-n junction they are doped with pentavalent (5 valance electrons) and trivalent (3-valance electrons) impurities into their crystal lattice. Common impurities in silicon transistors may be trivalent Boron for p-type and pentavalent phosphorus for n-type. Germanium conducts better when in conductive state than silicon due to 32 electrons per atom, but due to high electron density the device can handle very little electrical current.

Germanium was used in the past for pre-amplifiers. Silicon does not have as good conductivity and also does not provide very high hfe values. The highest hfe value you will find in signal transistors would be approximately 300, whereas power transistors you would commonly have an hfe of about 25. Silicon only has 14 electrons per atom. The main advantage is with silicon is that it has a lower electron density when it is in conductive state; to allow larger currents and higher power dissipation.

In the past, difficulty was experienced with the practical use of silicon due to its lack of 'purity'. Once a purer form of silicon was produced, there was no stop to it. Silicon is more cost effective. In 1998 silicon sold for $10 p/kg compared to germanium which was almost at $1800 p/kg.

Germanium is showing some comeback again. Gallium arsenide (GaAs) in wireless communications devices are being replaced with Silicon-germanide (SiGe) and become more useful with modern high speed integrated circuits. Germanium is also commonly used in infrared night vision systems and fiber-optics.

Ultimately one cannot say that Silicon is the only element used in transistors, but what one can say is that it is probably the most commonly used and most fundamental for modern applications.

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voltage regulator is a component to convert pulsating DC into constant DC.

The electrons in their valence band are so loosely bound that in the bulk material they form an "electron gas" that fills the material and can freely flow in response to voltage placed across that material.

power in watts

Current is inversely proportional to resistance. If you double the resistance, you halve the current. Ohm's Law: Volts = Amps * Ohms Solve for Amps: Amps = Volts / Ohms

no difference is there. if you connect an uncharged one to a battery/voltage source,current flow will be there for a short time which will tend to charge or in more precise manner will develop charge on its plates.if you connect this charged one to a resister or some load,then capacitor will itself act as a voltage source sending current in the circuit at the expense of the charge present on it.this is discharging current.both are same bunt one tends to put up charge while other does the opposite.

Because they're very small components. It's easier to mark them with coloured bands, then you can 'decode' the bands according to the internationally agreed colour-coding system.

Frequency is a factor for the size of the power transformer. Normally, a transformer operates better with 60 Hz, than with 50Hz, because there is better magnetig flux linkage between the transformer's coils.

Frequency of the alternating current, can also be used for counting time. So if the electric device is designed for 60 Hz , then it should be operated only with 60 Hz.

A: the answer lies with the power consumption of any device while operating normaly.