Electrical Engineering

electrons have less effective size than that of holes(which actually are not real)...formula says

m(mobility)=drift velocity/electric field=et/m where t is relaxation time..

so mobility is inversely proportional to mass

hence e has more mobility.

i think that it is possible that for unknown circumstances i don't know it.

Copper has a high thermal conductivity, not low.

This is a good generalization of any metal, although they vary in conductivity.

In Direct Current, electrons flow from the negative pole of the electrical source, through the load, to the positive pole of the electrical source. Current is constant as there are no variations in voltage over time in the circuit. Voltage and current are measured by directly measuring the voltage and current in the circuit.

In Alternating Current, electrons also flow from the negative pole of the electrical source, through the load, to the positive pole of the electrical source. However, the polarity of the poles changes +/- to -/+ to +/- , alternating polarity over and over again. This causes the direction of the electrons in the circuit to change each time the source poles change polarity. Current and voltage are not constant in an AC circuit as they vary with the waveform generated by the electrical source. In many, but not all cases, voltage and current are measured by the RMS (root-mean-square) method as directly reading the peaks of the AC waveform will not indicate the correct amount of energy in the circuit.

In three-phase systems, we always consider individualline or phase currents, or individual line or phase voltages. In other words, we treat currents and voltages no differently from single-phase currents or voltages (i.e. we don't 'combine' them because they are three-phase quantities). So these quantities are expressed in r.m.s. values.

No, that is a paralel circuit. a series circuit has two paths

Everything we see is made up of tiny little parts called atoms. The atoms are made of even smaller parts. These are called protons, electrons and neutrons. They are very different from each other in many ways. One way they are different is their "charge." Protons have a positive (+) charge. Electrons have a negative (-) charge. Neutrons have no charge.

Ramp voltage is a voltage that can be steadily increasing or decreasing.

an oscillating RC circuit

Instantaneous power doesn't have a frequency; it's instantaneous!

ghggh ghggh ghggh ghggh ghggh

Polar molecules have partial negative and partial positive charges on opposing sides. They have a net dipole as a result of the opposing charges.

RADITOR * Small generators either air cooled or water cooled 2 stroke. Autos are mainly 4 stroke and the majority watercooled.

because it can magnetize and demagnetize easily

For an inductive load, the current lags the voltage by 90 degs. Hence the power factor for an inductive load is 0. For a capacitive load, the current leads the voltage by 90 degs. Hence the power factor for a capacitive load is 0. For a resistive load, the current and the voltage are in phase. Hence the power factor for a resistive load is 1.

In Europe and other places the standard single-phase supply for houses and small businesses is 230 v which is derived from a 400 v 3-phase 4-wire supply by connecting each customer's circuit between one phase line and the neutral wire.

Radar can be used to detect distance to an object by determining round trip echo time. Some uses below:

Level monitoring of substances in a container or silo-the radar antenna transmits downward from the top of the container and determines the distance to the top of the substance, allowing the operator to determine the amount of substance in the tank.

Radar can be used by vehicle collision avoidance systems.

Basically, any time distance to an object is required, radar is an excellent solution.

Power factor is the ratio of apparent versus true power. It depends on the phase angle between voltage and current, and is the cosine of that phase angle.

This occurs because a motor is an inductive (reactive) load, constituting a stored energy device. In an inductor, current lags voltage. In a capacitor, current leads voltage.

Filter the output with a low-pass filter whose cut-off frequency is less than 120 Hz.

That process removes the energy at harmonic frequencies from the output waveform,

leaving only the energy at 60 Hz.

Because of fire

There is no object that is simply called "delta". On the other hand, there are several that have delta as part of their name, usually followed by the constellation, e.g. delta orionis, delta canis maioris, etc.

For a device the requires 2 amperes to run, a current of 1 ampere will not be enough. Such a current cannot be able to power all the components of the device to make them function properly.