Electronics Engineering

rms value of ac power = dc power in reference to heat production in pure resistive load

So ac power of some rms value will produce the same heat in resistive load as dc power will of same value

Two words: skin effect. Now let's chat. Picture a wire with DC flowing through it. We are going to look at a cross section of the wire without interrupting current flow. Make sense? Picture it. When current flows in a wire in only one direction (DC), it uses all the available metal in the wire. Current flow in the middle of the wire will be about the same per unit of cross sectional area as current flow will be near the outside of the wire. Let's switch our DC for some AC. AC (alternating current) will flow in one direction for a while and then reverse direction to flow the other way for a while. Such is AC. And AC will cause current flow that uses all the available cross sectional area of the wire just as DC does, but only at low frequency. At higher and higher frequencies, current flow in the wire will shift away from the center and be more concentrated near the surface of the conductor. Near the skin of the conductor. AC of higher frequencies will promote current flow by skin effect, and that is the effect of frequency in AC current flow.

No, a miliohm is 0.001 ohms. A kiloohm is 1000 ohms.

A: desirable oscillator will have no frequency deviation as a function of external influences such as temperature and more. Stability is measured as a % factor considering outside interferences

As we know thath insulators are the materials which are mainly use to insulate any conducting body from the LIVE supply whether 3Ph or single phase, so the reristence of such an insulator should be infinity as it should be provide maximum resistance to the flow of current through it.

You should always where a ground strip when working on the internals of a computer. You should always unplug the computer from everything before working on it and ground yourself to the computers metal case. This will equalize the static electricity between you and the mother board and her components.

You cannot build a power tube amplifier without bias. At minimum, you need some kind of negative bias on the control grid, and you might need positive bias on the screen grid as well as cathode voltage on the suppressor grid.

When light falls on the junction of a pn junction/diode the potential barrier gets break down due to majorty of electrons flow and they release energy in the form of light.

Germanium cannot be used in any integrated circuit as its oxide is crumbly and water soluble (unlike silicon's oxide which is hard and stable). The only germanium integrated circuits ever made were very low density and the interconnects between components on the chip had to be done by hand under a microscope.

There has been work done on integrated circuits using a silicon germanium alloy wafer, but this has not produced any production chips yet that I am aware of. If this can be made to work, I see no reason why this material could not be used in VLSI designs and even higher density designs.

The main role of electrical engineers in construction projects is to supervise the electricians in handling all the electrical works considering the safety and quality requirements. The electrical engineer in the construction site also reads and studies the electrical plans (usually done by electrical design engineers) and implement it in the site and sometimes do necessary actions whether to correct or to improve the design. They coordinate with other electrical engineers in the implementation of the electrical system design and also with other engineers of different fields, such as civil and mechanical engineers, to make the construction job easier.

A ballpoint pen is just a pen with a cap. A regular pen is one that clicks. They both work the same though.

Facts missing. Need two of three values. The resistors value. The voltage across it. The current flowing through it. P=I^2*R. P=E^2/R

A capacitor charge as a time constant of R resistance C capacitance in ufd and it is defined as 63% for one time constant for the constant voltage source. Electronic engineers assume that a capacitor is fully charged by a 5 times constant. however mathematically speaking it will never be fully charged for obvious reasons. Therefore the answer is current will never stop/

False.

The characteristic impedance or surge impedance belongs to a uniform transmission line, usually written Z0. It is the ratio of the amplitudes of a single pair of voltage and current waves propagating along the line in the absence of reflections.

Diodes get damaged when their reverse voltage or forward current ratings are exceeded. It is also possible that a high speed transient could exceed the forward voltage rating before the diode turns on, but this is not normally the case.

In a car, primarily in the alternator, diodes get damaged by excessive current draw, or by connecting batteries backwards when jump starting. One way to get excessive draw is to attempt to rev the source engine while cranking the target engine - that is not a good idea - you should only rev the source engine when you are trying to add some charge to the target battery - you should let the source engine idle when cranking the target engine.

coil and oil

analog video is generally a type of video form in which we have numerous waves in terms of crests and troughs in a continuous manner upside-down on X axis whereas, in digital video we have many bars that are upawrds and then downwards on X axis in a continuous manner that also includes two types of binary bits, either 0 or 1.

The human voice is an analogue signal because the frequency of the sound varies in the sound waves as well as their amplitude that gives the power. Analog signal is defined as a signal that has a continuously varying amplitude or frequency. Human speech, and everything else a human hear, is in analog form.

The difference between the avalanche diode (which has a reverse breakdown above about 6.2 V) and the Zener is that the channel length of the former exceeds the "mean free path" of the electrons, so there are collisions between them on the way out. The only practical difference is that the two types have temperature coefficients of opposite polarities.

The types of dc-dc converters are the ones with isolation and the ones without isolation. Isolation makes sence only into very high or very small ratios of Vin / Vout. Vin is the Voltage input and Vout is the voltage output of the converter.

The isolation is applied between input and output circuits by using a transformer.

The main types of converters are buck,boost and buck-boost (without isolation) and Cuk, Flyback and Forward (with isolation).

Electronic Private Automatic Branch Exchange.

Too much for this forum. Look for a night course on telephone technology.

They are essentially crosspoint switches with touch-tone decoders.

Yes, it is normal for a welding machine to convert AC voltage to a DC voltage.