Electronics Engineering

DC does not travel through a capacitor for long because there is a buildup of charge on the plates and when the voltage matches the supply voltage, mo more current flows.

But capacitors are used to smooth a DC supply because a capacitor acts a bit like a small battery and can prevent any rapid fluctuations in the supply voltage.

a digital input accepts a voltage level between 0 ( zero and 5 volts +

the digital circuitry is designed to accept a logic 1 or a logic 0 signal .

the logic 1 is equal to 5 volts optimum , but a tolerance is allowed.

the logic 0 signal is around 0 volts, to a limit of 0.8 volts.

thus a digital signal is designed to be at 2 distinct points or levels of measurement.

by comparison an analogue signal can be varying around a designed level.

the input signal is likely to vary and the cirucit inputs are designed to analyse and measure these signals.

All the bulbs will go out.

In a series circuit, the current at all points is the same. This is Kirchoff's Current Law. If you loosen or remove a bulb in a series circuit, the current at that bulb becomes zero, and by Kirchoff's Current Law, the current in every part of the circuit also becomes zero.

You measure current by inserting an amp meter in series with the circuit or using a clamp-on meter to measure current by induction. You measure voltage with a volt meter across the supply. You measure resistance in ohms across the resistance. Luckily all these functions are in the same meter in most cases.

A volt meter is used to measure volts.

So what are volts???

Volts are what a volt meter measures.

Imagine water being pushed through a pipe. If the water in the pipe is falling from a container at a higher place, it goes through the pipe at a higher pressure... sort of like volts.

A larger pipe allows more water through, sort of like amps.

why is extention

Resistance of the circuit = (voltage across the circuit) divided by (current through the circuit)

It became so popular because during the 1920s and so on, and during the Great Depression and World War 1 and such, it was usefull for a new standard in communication with your friends or communication in war but it was also sparked in regular citizens in the U.s and manyother places for leisure. Cause in that time, the radio didnt only broadcast news and music, but dramas, sitcoms, and music programs.

A radio receiver is an electronic device that receives radio wave/signal and convert the information carried by them to a usuable form through speaker. The principal functions of a radio receiver are frequency selection, amplification and detection of signals which are been convert back to its original form through the help of radio speaker.

There is no answer! It depends on the design of the bulb. You can have a 15 watt bulb that is 120 volts or one that is 6 volts. Watts is a measure of power. Volts times amps equals watts. At any given wattage, the higher the voltage is, the lower the amps and viceverca.

The main different between a traditional signal and a message is their recipient. A signal is often sent to a mass of people, while a message is more individualized.

although the AC signal is rectified the output which we get is the pulsating DC which is not desired because many appliances wok on plain DC voltage . The pulsating DC can be viewed as AC + DC component of the signal

ripple factor of a rectified circuit is the ratio of AC component of signal to the DC component of the same rectified output signal. higher the ripple factor says that the signal is not smooth so lesser is its application.

the components used to smooth these type of signals or to remove the 'ripple voltage' as called filters

Zener diodes are mainly used as voltage sources.

Since they provide a reasonably constant voltage drop, even when current changes, they are useful in small power supplies as voltage regulators.

plastc

we have to increase the winidin count of Coils inside the Alternator and also the Carbon mesh brush is to be increased so that the higher electric output will be produced................

Apex- leaning in one direction or another

It may be an attempt to apply a "catch all" phrase as an answer, but a sawtooth generator is used to supply sweep. And sweep is used widely in electronics applications. One application might be in the search for signals in a given frequency band using a spectrum analyzer. That band, that group of frequencies, would have to be "swept" by the receiver. It would have to tune in the different frequencies in order and on a continuous basis. By applying a sawtooth wave to a voltage controlled oscillator (VCO) used as the local oscillator in a receiver, the frequency of the VCO could be swept up the spectrum from a starting point to an end point, and then it could be done all over again continuously. The correct sawtooth voltage to the VCO would enable the receiver to make pass after pass across the band under study, and the strength of a signal on a given frequency could be indexed and shown on a display.

as per ohm law current is directly proportional to the applied voltage and inversely proportional to the resistance now u can calculat according to the formula by by putting the considered value and then by changing the values according to the question u will get the result to Analise the difference.

A: As base current increases the collector current increases to a point where any more base current will not increases the collector current at hat point the transistor is saturated whereby current may flow in both direction and the two diodes will essentially be in a parallel mode and the voltage drop from emitter to collector will reflect the status as a low voltage drop.

smaw and tig(gtaw) are using CC source. because these both types using manual wire feeding. so welder can not able to maintain constant arc length. change in arc length will change voltage. so it needs power supply which should not affected by this arc length = voltage changes. that's why CC type is used for these process. in CC type source change in voltage will not change current much.

Used the transformer. SO will be change 40vdc.

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Humm (no pun intended) - a DC transformer, must be something new in the market. A variable potentiometer will allow you to reduce the voltage to the required voltage you need. It will have to be of a higher wattage variety to dissipate the heat that will be generated depending on the wattage of the load at 40 volts.

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s-sum and c'-carry

see for half adder s=a(xor)b and c'=ab

for full adder s=a(xor)b(xor)c and c=ab+bc+ac or ab+c(a(xor)b)

we can convert two half adder to full adder with help of and or gate. . . !

we got two half adder

* for first half adder input is a and b

therefore. . .s=a(xor)b and c'=ab

* for second half adder input is a(xor)b and c

therefore. . .s=a(xor)b(xor)c and c' is (a(xor)b)c

note: now connect the c' of first half adder and second half adder to 'or' gate resulting is

ab+c(a(xor)b)

ANY METER needs some kind of current flow to operate. Internal in the meter there are batteries that provide current that when passed trough a resistor will develop voltage as a function of the current. the meter will read this current and display the resistor size to cause this current to flow.

Ic 7805 we are mostly used for regulator & its minimum input voltage is 7.2 V.

Sandeep Chauhan