Electronics Engineering

An offset is something which acts as a counterbalance, or a form of countertrade agreement where the seller agrees to purchase products of a certain value within a chosen time.

entity is a thing in the real world with an independent existance. and entity set is collection or set all entities of a particular entity type at any point of time.

take an example:

a company have many employees ,and these employees are defined as entities(e1,e2,e3....) and all these entities having same attributes are defined under ENTITY TYPE employee.and set{e1,e2,.....} is called entity set.

we can also understand this by an anology .

entity type is like fruit which is a class .we havn't seen any "fruit"yet though we have seen instance of fruit like "apple ,banana,mango etc.hence..

fruit=entity type=EMPLOYEE

apple=entity=e1 or e2 or e3

enity set= bucket of apple,banana ,mango etc={e1,e2......}

as voltage amplifier
current follower





i am yoges

I've been to Gadget Fx and the give a really good service and repair most electronics stuff

They also buy and sell stuff

They arre in Leeds West Yorkshire

The basic principle of generator excitation is that once the gasket of tie generator is being checked, the generator excits as if the block is not inserted. By egbebu emmanuel

No

Less expensive - Several miles of optical cable can be made cheaper than equivalent lengths of copper wire.

Higher carrying capacity - Because optical fibres are thinner than copper wires, more fibres can be bundled into a given-diameter cable than copper wires. This allows more phone lines to go over the same cable or more channels to come through the cable into your cable TV box.

Less signal degradation - The loss of signal in optical fibre is less than in copper wire.

Light signals - Unlike electrical signals in copper wires, light signals from one fibre do not interfere with those of other fibres in the same cable. This means clearer phone conversations or TV reception.

Digital signals - Optical fibres are ideally suited for carrying digital information, which is especially useful in computer networks.

Non-flammable - Because no electricity is passed through optical fibres, there is no fire hazard.

Lightweight and thin - An optical cable weighs less than a comparable copper wire cable. Optical fibres can be drawn to smaller diameters than copper wire. Fibre-optic cables take up less space in the ground.

To get all the audio voltage from a source to a target without loss you need voltage bridging, that is a relative low output impedance to a higher input impedance. Usualy the input impedance is at least ten times higher then the output impedance.
An input impedance is called also a load impedance or an external impedance.
An output impedance is called also a source impedance or an internal impedance.

A: I hope you mean replace. The answer is yes provided that the voltage rating is the same or more then the original.

A diode is unidirectional because of the diode only conduct in forwardbias .As you know the diode have two terminal cathode and anode . and when the positive terminal of battery connected to the p-side and other terminal connected to the other terminal of diode then diode is called forward biased . and when it connection is just opposite then it become in reverse biased .

so we can finally say that the diode is unidirectional

The first digital media in the world was the digital watch. This item gained strongly on the market in those years and is still used by many. Casio is probably the most famous company that produces digital watches.

Some examples of applications of phase modulators are: * A phase modulator within a laser resonator of a single-frequency laser can be used for wavelength tuning, or for active mode locking (FM mode locking) of a laser. * A phase modulation of a beam with moderate modulation strength is often used in laser frequency stabilization schemes, e.g. with the Pound-Drever-Hall method. * Various kinds of interferometers and setups for spectroscopic measurements require phase modulators, often with a periodic drive signal. * Some metrology applications require frequency combs, generated by sending a single-frequency beam into a phase modulator. In that case, the phase modulation often needs to be strong in order to obtain a large number of optical sidebands. * In data transmitters of optical fiber communication systems, phase modulators can be used for encoding the transmitted information. An example is the method of phase shift keying. Source: http://www.rp-photonics.com/phase_modulators.html

if the load is capacitance then reactive power is injected in the circuit, as we know that reactive power is directly proportional to the voltage, if there is increase in reactive power automatically voltage at load end of the tranformer is increases

A dc generator is a machine which works on the principle of electro magnetic induction $it converts the mechanical energy into electrical energy.

no,we cant use transistor by combination of two diodes because we will come across a condition called current hogging.it means large amount of current flows through the device,diode can just rectify the signal but not amplifies it.

Transistors however, can be used as diodes.

semiconductors are the conducors they are partially conduct electricity. And we can increase therir conductivity by using various method . They are Intrinsic method and extrinsic method . Intrinsic method is heating the semiconducter . Extrinsic method is doping. By using this method the conductivity of semiconductors is rapidly increases. Then we use semiconductors are prefferd to conductors

FOR n-type semiconductor the majority charge carrier is electron and for n-type semiconductor it is hole.

the majority and minority charge carrier is result of free electron and hole.

the majority charge carrier is responsible for transport of electron.

When comparing them to breadboards and stripboards:

Advantages - it is a permanent method of producing a circuit

- they are custom made so can be very small

- they can be mass produced and so economical

Disadvantages - can't be modified once printed (has to be completely re-designed)

- can't change components

Hysteresis losses are a function of the magnetic characteristics of the magnetic circuit, so there is very little you can do to minimise hysteresis losses other than to reduce the primary voltage to a transformer if that is at all practicable. These losses are really in the hands of the manufacturers who design and manufacture magnetic circuits.

They both convey differences in voltage level. An anologue signal can send any level between limits. A digital signal only sends two different levels, one represents a 1 or high level, the other represents 0 or low level.

1000

If the current through a coil is interrupted, the coil generates a high voltage (such as in the old car ignition coils). The diode provides a path for the current to decay naturally, thus avoiding the high voltage.