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what is the difference between reverse characteristics of zener diode and a practical diode ?
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∙ 14y ago
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What is the zener region?
The zener region describes the area on the performance curve (a graph of voltage across versus current through the junction) of a zener diode. The diode acts like a "regular" diode in the forward biased direction. When some 0.7 volts or so is reached, forward current begins to climb rapidly as voltage is increased (for silicon diodes.) But in the reverse direction recall that as the diode is reverse biased, a small amount of current will flow (because of minority carriers). This "trickle" of current will continue until the "zener voltage" is reached, and then the diode will begin to conduct heavily. On the graph, this is the zener region. Zener diodes can be made to breakdown at a specific voltage, and their ability to conduct reverse current can be increased by manufacturing a larger diode. That means there are a range of voltages and wattages of zener diodes available. Wikipedia has more information and that graph. Use the link provided to get there.
How do you plot graph on forward and reverse diode bias?
You generally plot a graph of Voltage v/s Current (with voltage on Y axis and current on the X axis). The graph will not be a straight line.
Why the graph of reversed biased diode is lies in third quadrant?
-- The definition of 'reverse bias' is anode negative with respect to the cathode, or negative voltage across the diode. That places the graph in negative-x territory. -- The diode simply acts as a resistor. Its unique 'diode' characteristics arise from the fact that its 'resistance' changes with different bias points, but the current through it always has the same polarity as the voltage across it. Therefor . . . -- When the voltage across it is negative, the current through it is also negative. Negative current appears on the graph in negative-y territory. -- Negative-x territory/negative-y territory is the third quadrant.
How is zener diode different from ordinary pn junction diode in its fabrication?
An ideal zener diode will have zero reverse current while the reverse voltage is less than the zener voltage. Once the voltage rises above the zener voltage, the maximum reverse current will become infinite (the device will become a short). On a graph with voltage along the X axis and current along the Y axis, this would be represented by a straight vertical line crossing through the zener voltage. A practical zener diode has a monotonic change from zero current at zero volts, rising gradually as the voltage approaches the zener voltage from below, then rising sharply as the voltage is around the zener voltage. This means that with reverse voltage applied even slightly below the zener voltage there will be some current flow. This can be a problem in some circuits if not understood and accounted for.
How do you find the Reversed voltage of a diode?
If you want to find it on your own, apply an increasing reverse voltage to the diode until a large current flows. If you do this, put some sort of resistor in series to prevent overload. This will ruin the diode.Or you can check the data sheet. a good search for the particular diode you are using should help, or you can go to the company who sold you the diode and they should have a data sheet readily available. There should be a graph showing reverse current vs. voltage. There should also be a line in the data sheet that says peak reverse voltage which may be easier for you to follow and understand.
What are the characteristics of a graph?
The characteristics of a line graph is that it always has a straight line. A bar graph's characteristic include bars of an equal width. Pictographs, on the other hand, has the characteristics of showing the number of an object or value of data with the use of full or partial objects.
Why the current-voltage graph for a diode is not a straight line?
you might not have the right results so you should try again.
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What are the characteristics of the graph of the reciprocal parent function?
It is a reflection of the original graph in the line y = x.
What are characteristics of the graph of the reciprocal parent function?
It is a hyperbola, it is in quadrants I and II
What are the characteristics of a histogram?
*Used to compare range *Bar graph with ranges
