Electronics Engineering

OK, well Earth Loop Tester have a permanent magnet in it. When we rotate it, the flux cut the the conductor and consequently an emf is produced. As we connect the two point of the tester to the earth it complete the circuit and current start flowing through it.

The ratio of voltage and current give us the Impedance of Earth.

Because Voltmeter measures potential difference BETWEEN two points so it should be connected to these two points and the only way for circuit and voltmeter to be both connected to the same 2 points is in parallel. Ampermeters measure the current THROUGH some circuit so the same current that is flowing through this circuit should flow through the ampermeter too. The only way is to let the current going through the circuit to go through the ampermeter later or before, so you have to connect ampermeter in series with your circuit. The fact that voltmeters have high resistance while ampermeters have low resistance is the side effect of the way how they are connected to reduce the error introduced by devices into measured value.

advantages are being able to communicate, and transmit information over long distances. unfortunately though they cannot transmit into space on there own, and can break - being made out of fine glass and plastic that they are!
disadvantages is that you get splinters from the fibres and the really hurt trust me ive had a few of those little suckers ha de ha

Adding more lamps in parallel (across) a line will cause total current to climb. It will keep climbing (increasing) until a load protection device (circuit breaker or fuse) breaks the circuit or until something fails because of excessive current.

The speed of the conductor through the magnetic field, which translates into the number of magnetic lines of force the conductor can cut per unit time, will determine the magnitude of the voltage induced in the conductor. As an additional factor, if a longer piece of wire can be moved through the magnetic field, it will induce more voltage as well. The more speed we can put on the conductor, and the more of the conductor we can move through the magnetic field, the more voltage we can induce in the conductor.

An electronic computer has miniaturization, speed, and flexibility which you cannot possibly get if you build a purely mechanical computer our of gears and levers.

No. If the load is truly resistive, just measure the voltage across the load (in volts)and the current flowing in it (in amps) and multiply them. eg: 115 volts at 1.5 amps = 172.5 watts.

The significance is that Ohm's Law - together with the two Kirchhoff's Laws - are used all the time to do all sorts of calculations in circuits.

From Wikipedia's listing under the "war of currents" (http://en.wikipedia.org/wiki/War_of_Currents): In the alternating current system, a transformer was used between the (relatively) high voltage distribution system and the customer loads. Lamps and small motors could still be operated at some convenient low voltage. However, the transformer would allow power to be transmitted at much higher voltages, say, ten times that of the loads. For a given quantity of power transmitted, the wire size would be inversely proportional to the voltage used; or to put it another way, the allowable length of a circuit, given a wire size and allowable voltage drop, would increase approximately as the square of the distribution voltage. This had the practical significance that fewer, larger, generating plants could serve the load in a given area. Large loads, such as industrial motors or converters for electric railway power, could be served by the same distribution network that fed lighting, by using a transformer with a suitable secondary voltage. Bottom line: Less voltage drop across long distances of wire, and easily stepped up or down in voltage as needed. "One voltage fits all" approach.

R = V / I (Ohms Law) A greater voltage results in more current. In the particular case of a light bulb, the resistance will change with current because its temperature changes. We assume here that the bulb is rated to take 200V.

AC or DC?? If it is DC voltages, series the sources together. eg. + 1.5V - to + 1.5V - = 3 VDC. If AC you will have to find a transformer in that range, 1.5VAC primary to 3VAC secondary.

A 'model' simplified circuit is a circuit that performs very closely to a real, usually far more complicated circuit. Model circuits are used to help analyse the behaviour of more complicated circuits. Often, there are various models which make different assumptions about the actual circuit, in many cases offering various degree of simplification. For example, there are several different model circuits that represent a transformer, with the simplest model assuming that the transformer has absolutely no losses whatsoever, and the more complicated models taking into account those losses. Another example of a model circuit is when we represent, for example, an inductor in terms of its inductance and resistance with these quantities being connected in either series or parallel.

When media outlets use propaganda or opinion based information to sway opinions of the viewers,, or follow a certain narrative, usually for a political or social objective. To see how biased certain news sources are rated, check out the bias meter at Politic Nation. Hope this helps.

All amplifiers are classed into thee modes of operation. Class A operation reproduces the full input signal and is the most faithful reproduction of the input signal of the the three. Class B operation will 'clip' some of the signal during amplification resulting in less than 100% of the signal being reproduced and Class C operation will reproduce less than 50% of the input signal.

There are also A/B mode and B/C mode amplifiers, the names of the mode are self explanatory as to operation.

You will find Class A amps in high fidelity audio gear, and Class C amps in items like survivial radios. (due to low power consumption by only amplifying part of the input signal)

It is smoothing

Whether an element has an advantage or a disadvantage depends what you want to use it for. A specific element - such as carbon - can be very good for some uses, and not good at all for other uses.

in digital electronics, engineers use low voltages like 5 or 12 or 24 volts but when they want to transfer electrical energy in high power which means high voltage and high ampere they use power electronics .

in power electronics sometimes the transistor or diode or in power electronics language IGBT and thyristor can work in 10000 volt or higher voltages

formula for determining potential difference

A: SIGNAL could overshoot a value which can damage the input or output therefore a diode is used to clip these signals to a safe level

Binary (Bipolar) Phase Shift Keying.

current is the killer not volts, you can have thousands of volts but with out flow (current) the danger is minimal, but if you have voltage its very easy to induce current so be careful and let a professional take care of it if you do not know what you are doing.

Two reasons.

1...When impedance of source and destination match, power transfer is maximum.

2...If a long transmission line is involved, the characteristic impedance of the line must match the destination impedance, or reflections will occur on the line.

A positive

In power supplies both coils and capacitors are used to smooth the pulsing DC output.