Electronics Engineering

Total capacitance for parallel capacitors is simply the sum of all capacitor's individual capacitances. This would apply within (reasonably) any frequency, ignoring non-ideal resistance and inductance, so the same can be said for capacitive reactance.

Advantages:-

1- mosfet are small compare to bjt's so it fabricated easily and space saving scheme on the ic's

2- mosfet's input impedance are very high so they do not load the circuits. loading effect doesn't arise.

3- operating frequency is very high so may be used at higher frequencies.

4- used in digital circuits for it's reliability.

5- effect of noise is less than bjt. so high signal to noise ratio.

6-mosfets are unipolar devices so reverse saturation current doesn't exist.

7- it consume less D.C power rather than BJT.

Disadvantages:-

handling is not easy-

Mosfet is very sensitive to electrostatic charge so it may be destroy when you touch the pins of a mosfet devices by hand.

trans conductance is low than BJT.

The equivalent resistance you would have to place in series with an ideal battery (which of course does not exist) of the same voltage to get the same behavior (voltage drop with load) as the real battery has. It is a mathematical modeling technique to help in circuit analysis.

by using main frame computer where all costumes data are stored as usage and billing will be processed and send out automatically

A carrier is used to make the wavelength smaller for practical transmission and to permit multiplexing.

The spectrum is used to measure bandwidth (the range of frequencies) and the efficiency (the power in the side-bands compared to the total power)

Bandwidth can be predicted using BW = 2 fm where fm = the maximum modulating frequency

Efficiency depends only on the modulating index, m (the fraction of the carrier you modulate by)

AM is limited to 33% efficiency because the modulation index cannot be increased to > 1.0 without introducing distortion in the receiver.

A capacitor in its simplest form is merely two electrically conductive plates separated by an insulator from each other. As such the capacitor will block any DC voltage from passing through it, up to the electrical dielectric strength of the insulator. The capacitor will accept a DC charge and an electrical field will exist between the plates of the capacitor. The capacitor will retain this charge until it either leaks away via the high electrical resistance of the insulator, or is intentionally discharged.

When an AC or varying voltage is applied to a capacitor, a varying electrical field is set up between the plates of the capacitor. This will thus pass through the capacitor, and can be seen on the opposite plate. Thus, a capacitor will pass an AC voltage.

Now,as to the question, " application of Capacitor". One of the oldest and most useful of capacitor applications is filtering or smoothing the output of an AC to DC power supply. In this supply, an AC voltage is rectified by a diode into a varying DC voltage. A capacitor is placed across the output, and serves to supply voltage or "fill in" the output whenever the output voltage is less than the capacitor. The capacitor subsequently recharges on the next cycle and repeats the process. Thus, the output voltage of the power supply is smoothed out.

Because an electron carries a negative charge and in electricity, opposites attract. Particles with a negative charge will be drawn to the positive charge in the cathode tube.

Transistors provide most of the activities a circuit needs to operate. In their most basic representation, transistors are amplifiers. That is, they take and amplify a signal from the level produced by a microphone and amplify it enough to blast it out through a speaker. Transistors are also used on decision making circuits, like electronic gates and Central Processing Units (CPUs). Solid state, electronic systems like desktop computers, cell phones, and GPS devices would not be possible without transistors.

Fm radio waves travel at various frequencies between 87.5 MHz and 108.0 MHz

Anything that a voltmeter is measuring has some internal output impedance. If the voltmeter had a low input impedance, these two impedances would form a voltage divider and reduce the voltage measured.

The voltmeter has a high input impedance so that it does not affect ("load down") the thing it is measuring.

The main advantage is that transistors use less power. A typical small vacuum tube uses about 1.8 watts to heat its cathode, plus 3-5 watts to supply the main current to the anode.

By contrast a computer motherboard might take 10-20 watts to power several million transistors.

Certainly, the question poster meant 5,000,000 -- or 5 MB -- per song. One gigabyte (1GB) = 1,000 MB. So, 1000MB/5MB = 200 tunes. If the question writer really means 5,000 bytes (5KB) per song, well, then you can store 200,000 tunes!

There ARE no magnetic lines of force. The magnet and iron filings demonstration causes the illusion of lines, but if you take a picture of the "lines" and replace the paper and iron filings, the "lines" will appear in a different place. But if there WERE lines of force they probably could exist in vacuum.

No, it will overcharge the battery and overtime destroy it.

BJT & FET parameters are temperature dependent. In BJT the collector junction resistance decreasing ( collector current increasing) with temperature raise.Due to the highe temperature & current transistor will damage quickly. In FET drain resistance increasing (drain current decreasing ) with increasing temperature.Due to this property it will not damage easily. We can say from the above two statements FET is more temperature stable.FET can use in highe temperature applications.

Mixing salt and water does not make electricity. However, when the salt (NaCl)ionizes in the water meaning the Na+ ions and the Cl+ separates in the water, it creates an electrolyte. The term electrolyte means that the solution of salt and water can conduct electricity.

AM.

The force that makes electrons move is a voltage, or potential difference and both are measured in Volts. When electrons move, the rate of movement is current, measured in Amps. The amount of current is dependant on both the resistance in a circuit and the voltage. The higher the resistance, the lower the current. The higher the voltage, the greater the current.

The symbol for voltage is "V" and confusingly, the symbol for current is "I". The unit of resistance is the Ohm with the symbol "R" or the Greek symbol for omega.

Use the short USB lead and plug into your computer. It will plug into the USB jack on a wireless router (mine works on my BT HomeHub), a laptop and the hard drive.

There is no easy way to store electricity. capacitors can store a charge but for commercial usage totally unsound. The way that man learnt o store electricity is by building dams and storing water. So when watter is released energy that energy can be converted to electricity.