Electronics Engineering

The experiments of Georg Ohm set the foundation for this law, which is also known as Ohm's Law.

A triac is a high voltage AC solid state relay it is switched on by applying a dc at the gate it can't be used to switch DC because it stay on while current is flowing even when the gate is low but with AC the current stop flowing when the cycle go zero and will switch of if the gate is low

A 30 volt 90 watt lamp has 3 amps going through it. The series resistor also has 3 amps going through it, by Kirchoff's current law. The voltage across the resistor is 90 volts. With 3 amps, that is 30 ohms. (By the way... The resistor must be rated to carry 270 watts. That is a lot of power for a resistor.)

Sources with different voltages should never be connected in parallel, you would have a difference of potential. Any time you have a difference of potential connected together you will have sparks, which could cause the batteries to explode.

Active means devices that perform functions in a non linear fashion [amplifiers] passive are components that perform according to a set of linear rules

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An arbitrary identifying number. These numbers are usually selected by the first manufacturer of the part.

No Problem to do this, but there are really no amplifiers with an output impedance of 4 ohms on the market. All loudspeaker amplifiers have an impedance of less than 0.5 ohm. Scroll down to related links and look at "Impedance bridging - Wikipedia".

Cells by mitosis and meiosis (;

It depends on the mass (m), specific heat (c), convective heat transfer coefficient (h) and the surface area (As)

In other words,

Time Constant = (m * c) / ( h * As)

Yes, the Yagi-Uda antenna has several parasitic elements, in the form of a reflector ("behind" the driven element) and the directional elements ("in front" of the driven element).

This is what is known as a "short circuit".

Bottom line: Start by checking the ducts and turning up the thermostat a few degrees. If you still have problems call a pro.

Reason:

The most common cause of icing on the evaporator coils is insufficient air flow. Check to make sure the ducts are clear of any obstructions or debris, particularly the inlet duct. Also make sure that you have not closed too many of your outlet registers.

If there is plenty of airflow but you are still getting icing, you are probably over-working the system. You may need to turn up your thermostat and deal with slightly warmer indoor temperatures until the weather cools off.

One final possibility, some systems have a hot gas bypass valve to prevent icing and if it is not functioning properly, that could be the culprit. I mention this last because it is not very common in home air-conditioners. If yours has one and it isn't working that would require professional assistance to diagnose and repair.

Resistance is the property of a conductor, which determines the quantity of current that passes through it when a potential difference is applied across it.

A resistor is a electrical componet with a predetermined electrical resistance, like 1 ohm, 10 ohms 100 ohms 10000 ohms etc..

depending on how much current you want to pass through a circuit, you would design the circuit with the required resistors

No, an open resistor has a value of infinity. An open resistor typically will measure over 900 Megohms. A zero ohm resistor is exactly that, and will measure zero ohms. They are typically surface-mount devices.

yes indused emf is also called motional emf.

If an open coil is subjected to a variable magnetic field, at the ends of the coil a potential difference is induced which is called induced emf.

If a coil is connected to an emf source and switched on, the rising current will produced an variable magnetic field which in turn produces an emf. It is called back emf.

Analog Modulation

1. Silicon is opaque to all light (IR through UV).
2. The bandgap of silicon is not high enough to produce visible photons, only IR photons.

The working voltage of a capacitor depends on the nature of the dielectric and its thickness. Most capacitors are marked on the case e.g. 500V wkg. or just 150V. Small components are colour coded; the code will tell you the capacitance, and the wkg voltage.

A: No problem but don't expect the power to increase

An integrated circuit or monolithic integrated circuit (also referred to as an IC, a chip, or a microchip) is an electronic circuit on one small plate ("chip") of semiconductor material, normally silicon. Such a circuit can be made very compact, having up to several billion transistors and other electronic components. The width of each conductor (the line width) can be made smaller and smaller as the technology advances, and can now (in 2012) be expressed as a two-digit number of nanometers.

This question is worded awkwardly, but, the answer would be, They must be of equal Voltage (primarily) and equal frequency. If they were of different voltages, one would feed the other. The amperages can be different.

If these generators were going into a distribution unit, the DU would have to have a frequency matcher, and would also force the output voltage to meet the load voltage (in the case of minor voltage deviations).

Can you rephrase this question into several smaller questions? I'll help you out as much as I can from there, and go to "MY Bio Page" and ask other more detailed questions.

Amplitude distortion occurs in an electronic signal when the power of the amplifier is not great enough to carry the sine wave to its intended peak amplification. If you look at the wave form of a amplitude distorted output signal, it would look like someone had neatly sliced off the top of a hill. Though amplitude distortion is usually an undesired result, the effect is sometimes used intentionally for audio applications, such as a distorted rock guitar which gives that crunchy rock sound.

red (rare), metallic green, blue, light blue, brown, lime green, yellow, silver, black, gray, purple (rare).

A VOM will never do it. A curve tracer Will check all the parameters. Actually that goes for any other component you want to test.