Why RC oscillators are not suitable for high frequency generation?
Because an RC oscillator is affected by stray capacitance in the active components in the circuit. HF oscillators use an LC tuned circuit to define the frequency.
What are transistors used for?
Transistors have two basic functions: # an electrically controlled electric switch # an electrically controlled "proportional valve" which can alter currents and voltages, or can amplify electric signals.
Transistors can also be configured as Oscillators which provide an AC signal with constant frequency. Either an amplifier circuit or a switching circuit can be wired as an oscillator.
Transistors can be used to form logic gates: And, Or, and Invert. Computers are made from logic gates, so computers can be made entirely from transistors.
Transistors are in use in virtually all electronic devices. PC processors are composed of millions of tiny transistors. A transistor radio may have had only 6-10 transistors to enable operation. A late model car may have 10 to 15 computers comprised of thousands of transistors to perform all manner of operations in the vehicle.
What is meant by stray capacitance?
ANSWER Stray capacitance is the capacitance in a circuit not caused by capacitor components. There is a small capacitive effect, often on the order of a few picofarads, between leads of ICs, traces on a PCB, wires in a cable, the power and ground planes in a PCB, etc. In high-speed circuits, stray capacitance can be enough to completely change the operation of a circuit -- even to the point of keeping it from working as designed. Note that capacitor "components" can include PCB traces specifically designed to act as capacitors.
What is a bad conductor of electricity?
There are many. One example is plastic.
to expand first are the ceramics, then glasses, finally plastics.
Who was the Xerox machine invented by?
The plain paper copier, often incorrectly called a "Xerox MAchine," was developed by a team of engineers and technicians employed by the Haloid Company in Rochester, NY. They based their work on the process of electrophotography, or xerography, that was invented by Chester Carlson in 1938, and Mr. Carlson worked closely with Haloid on the development of the first commercial plain paper copier.
SMPS = Switch Mode Power Supply
Here is a link to help you out:
http://www.nanaindustries.com/html/SMPS.html
What is a software defined radio?
Software defined radio is a communication module which has hardware components which rely of software programs to run. This mainly entails receivers and transmitters which are used for radio communication.
What is FAT in computer terminology?
It is computer file system architecture which means:
File Allocation Table
Electricity is the flow of what?
Current is the flow of charged particles called electrons through a conductor. Since we can't observe individual electrons to imagine how they flow, assume you have a large vat filled with water. Imagine that each molecule of H2O is an electron. So the vat is storing a lot of "pseudo electrons" in this analogy. Now assume you have a valve at the bottom of the vat. If you open the valve a tiny bit you have a large, but finite resistance to the flow so you have a small "current". If you open the valve more you decrease the resistance and thereby increase the flow.
In what year was the second computer invented?
The first computer, sold to the public was introduced around the 1970's.
Could you explain the power dissipation in diodes?
Diodes are not perfect devices. When current flows through a diode, it offers some resistance. And the resistive characteristic will cause the generation of thermal energy - which is heat. Diodes come in different "flavors" or types, and they also have ratings. These ratings include the amount of current they are capable of carrying, the reverse voltage they can withstand, and some other characteristics. In the case of zener diodes, they have a current rating, a breakdown voltage rating, and a wattage rating that speaks to the amount of heat the package can dissipate. If we look at something like a rectifier diode rated at, say, a hundred amps, it will be stud mounted. Additionally, there will be specifications regarding the size of the heat sink onto which it is fastened. Again, these diodes will generate heat because their forward resistance, while low, is not zero. Even at a fraction of an ohm of resistance, at a hundred amps, there will be some heat generated when the diode conducts. The devices will need to be bolted up to a pretty heavy plate of aluminum to give the heat some place to go.
Does a dictator block ac current dc current or both?
Never heard of a dictator in the electrical trade. Well, I shouldn't say that, there was one journeyman when I was an apprentice.
What is the connection between binary and hexadecimal numbers in the programming world?
The connection between binary and hexadecimal in the programming world is exactly the same as the connection in the mathematical world. All numeric bases that are themselves a power of 2 (base-4, base-8, base-16, base-32, etc) are trivial to convert both to and from binary.
A single base-4 digit maps to exactly 2 binary digits:
0 = 00
1 = 01
2 = 10
3 = 11
A single base-8 (octal) digit maps to exactly 3 binary digits:
0 = 000
1 = 001
2 = 010
3 = 011
4 = 100
5 = 101
6 = 110
7 = 111
A single base-16 (hexadecimal) digit maps to exactly 4 binary digits (also known as a nybble):
0 = 0000 1 = 0001 2 = 0010 3 = 0011
4 = 0100
5 = 0101
6 = 0110
7 = 0111
8 = 1000
9 = 1001
a = 1010
b = 1011
c = 1100
d = 1101
e = 1110
f = 1111
And so on for base-32, base-64, etc.
Hexadecimal is the most useful notation because a byte is normally 8 binary digits in length and we can represent a byte as two nybbles using just two hexadecimal digits as opposed to 8 binary digits.
For longer binary values, such as 32-bit, 64-bit or 128-bit values, using a more concise notation makes the value much easier to read. Consider the following:
1011010010110100101101001011010010110100101101001011010010110100
1011010010110100101111001011010010110100101101001011010010110100
These two binary values look the same but they are not. With hexadecimal notation it becomes easier to see the difference because there are fewer digits to compare:
b4b4b4b4b4b4b4b4
b4b4bcb4b4b4b4b4
What is the difference between through-hull transducer and transom mount transducer?
A thru-hull transducer is mounting through the hull of the boat. So you would actually take the boat out of the water, drill a hole in the boat approx 2" in diameter(depends on transducer model) and mount the transducer "thru-hull."
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A transom-mount transducer is a transducer bolted to the transom of a boat.
Both kinds of transducers need to be submerged in the water for them to work correctly.
www.sailboattalk.com
I dont know a whole lot about this but I do know you dont drill a hole thru the hull. I have a ranger and from the factory mine was placed inside of the hull under my battery storage no hole needed to be drilled. But on a transom mount you have to drill holes into the transom.
The jelly-like cytoplasm fills the cell and supports its structure. It allows the cell to take up 3-dimensional space as the cell's many organelles "float" freely inside it. Cytoplasm acts as a medium for transport of materials inside the cell.It also makes food
A resistor is connected between a voltage source and a capacitor, charging the capacitor slowly over a time. The actual time depends on the resistance value of the resistor and the capacitance value of the capacitor. Together they produce something that is described as their "time constant value".
The 555 measures the capacitor voltage as it increases and compares it to a threshold to trigger things at certain time intervals, and also 555 has a circuit to discharge the capacitor and restart the charging process. By using clever circuit connections, a 555 with a resistor and capacitor can be used to generate pulses, delays, and periodic signals like pulse trains and low-speed clocks for digital circuits.
How do you wire 2 8 ohm subwoofers to a 4 ohm amp?
Hook all the negatives together, and hook all the positives together. you would have 2 wires for each. one from the amp to the first sub, and another going from the first sub to the second.
Why do wires often have plastic wrapped around them?
Well plastic is a insulator which causes the electrons (also known as electricity) to stay in place. So wires are electrical conductors which means electrons to flow through it and since humans are "fair" electrical conductors it will cause us to get shocked from the electrical charges. Understand? :)
What is the difference between a voltage converter and a voltage regulator?
the difference between a voltage converter to a voltage regulator,is that a voltage converter,converts or changing the desired voltage to be used while the voltage regulator,regulates the input of the voltage amount not to excess to its inputs.
What is the difference of peak and rms value?
RMS stands for "Root of the Means Squared", and is a mathematical method of defining the "operating" voltage of a sine wave power source.
Typical home lighting and outlet voltage presently is 120 VAC (volts alternating current), 60 Hz. (Hertz, formerly referred to as "cycles per second".)
But the PEAK voltage is the absolute maximum voltage at the "peak" of each sine wave of voltage. Mathematically, the "Peak" voltage is 1.414 (which is the square root of the number 2) times the RMS voltage, and conversely, the RMS voltage is 0.707 times the PEAK voltage.
How Radiation mode work in a optical fiber?
For an optical fiber or waveguide, a radiation mode or unbound mode is a mode which is not confined by the fiber core. Such a mode has fields that are transversely oscillatory everywhere external to the waveguide, and exists even at the limit of zero wavelength.
Specifically, a radiation mode is one for which
where β is the imaginary part of the axial propagation constant, integer l is the azimuthal index of the mode, n(r) is the refractive index at radius r, a is the core radius, and k is the free-space wave number, k = 2π/λ, where λ is the wavelength. Radiation modes correspond to refracted rays in the terminology of geometric optics.