Electronics Engineering

importance of voltage is the potential difference between two points.

conductiong channels

Below the diode's Forward Voltage (Vf) typically 0.7V, the curve is at (roughly) zero. At around 0.5 it begins to curve upward, and at around 0.7V, the voltage drop is almost constant (the curve heads straight upwards to infinity). See link.

ohm's measure resistance, the more ohm's the more resistance the less voltage

90-Sr is the answer.

how modulation index varies for FM

It is a standard diode, with an additional line leaving the cathode (- side) for the gate. See wikipedia link.

yes

Depends if you want to convert an RF signal to a different frequency, as all superheterodyne circuits do (most TVs and radios). That's called a frequency mixer.

If you want to change a power line frequency to another, rectify it to DC, then chop with an inverter.

'Voltage' is simply another term for 'potential difference', and an electromotive force is the open-circuit, or no-load, potential difference of a source such as a battery or generator.

Use Ohm's law: V = IR (V=voltage, I=current, R=resistance). Example: 3mA flows thru a 1kOhm resistor. V = (0.003 * 1000) = 3V.

temparature, collector current, reverse saturation current, beta of atransistor

A Class C amplifier typically uses less than fifty percent of the input signal in other amplifiers. It also has two modes of operation, which are tuned and untuned. The tuned circuit emits at a certain fixed frequency, while the untuned can vary.

300nm is the "wavelength". Wavelength and frequency are related by the following equation: λ = v / f Where λ (gamma) is the wavelength, v is the speed of the wave (typically c, the speed of light (3×10^8 m/s)), and f is the frequency. So f = v / λ. So a 300nm wave, (λ = 300*10^-9 m) has a frequency of (3e8 / 300e-9) = 1e15Hz or 1,000THz. 500nm: (3e8 / 500e-9) = 6e14Hz or 600THz. See link.

(This answer assumes that this is a straightforward question about the electrical term "DC". If it is about something else, feel free to explain in the discussion area and I will try to answer.) "DC" refers to Direct Current. This is as opposed to "AC", which stands for Alternating Current. Direct Current involves a flow of current (electron flow) in one direction only. The delivery of power to an electronic circuit is by far the most common application of DC current in your house, for example. (There are some high power DC power delivery systems used in industry as well as other non-domestic applications such as welding.) Alternating Current involves a flow of current that reverses direction periodically, that is, at some "frequency". Historically, the vast majority of "signalling" was done with AC. This corresponds to what we commonly call "analog" today, including audio, radio, and telephone communications. With the advent of the digital age, digital signal transmission (in the case of signaling over most wires and circuit traces) could be considered to be switched DC, since the current direction does not reverse, i.e., during the signalling of a digital "one", current flows in one direction, while during the signalling of a digital zero no current flows (so the direction does not alternate, it only stops and starts). (By no means all digital signalling is DC however. All wireless transmission could be considered to be AC, and signalling in systems such as USB and FireWire is AC.)

Advantages: simple turn On Latcing device, turn ON gain is very hih, low cost,Hih voltage and high current device. Disadvantages: Low switching speed, most suited for line commutated applications betwee 50 and 60 Hz can not be turn off with gate controlled. From: N.G.PATEL(UPS)B.TECH.(ELECT)

Gain crossover frequency is the frequency at which a system's magnitude is equal to unity, or 1.

External voltage is the ration when there is an increase in current and voltage. If you apply voltage to the outside of a circuit and need to figure out the amount of current flow, that would be the external resistance.

Assuming you have the output of an AM modulated voltage hooked up to a properly matched antenna, you're really transmitting electromagnetic waves.

An electromagnetic wave, when intercepted by another antenna that is somewhat matched to the frequencies being used, induces a (tiny) voltage on that antenna that can be rectified, amplified, and turned back into sound waves on the receiving end.

Given two inputs, A and B. Use one NAND as an inverter (one source to both inputs) for A.

Do the same for B. Use one NAND gate with inputs \A (not A, the output from the first gate) and B.

Use one NAND gate with inputs A and \B. Use one last NAND gate with inputs coming from the two previous gates. Its output will behave like an XOR gate.

Alternatively: Gates G1, G2, G3, G4, arrange in a diamond with G1 and G4 at the left and right vertices, A input along top edge, B input along bottom edge. G2 at top center, G3 at bottom center. A goes to G1 and G2, B goes to G1 and G3, G2 and G3 go to G4.

Net list: A - G1i1 A - G2I1 B - G1i2 B - G3I2 G1o - G2i2 G1o - G3i1 G2o - G4i1 G3o - G4i2 G4o - A^B

%m = Ei/Ec *100 or % m= V max -V min/Vmax+Vmin * 100

According to IEC terminology, there are 3 typesof earthing schemes. they are

TN, TT and IT.

PIPO, or Parallel In, Parallel Out is indeed a shift register.

It's seems as though you have answered the question yourself. You have stated exactly what it is (manufacture and model number). It was made in China and their exclusive distributor here in the US is "Instrument Sales & Service" out of Wilmington, DE. In case you need it, their number is 1-800-874-7637.