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Answer given by Sehdev Kumar B.Teh. 1st year
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What is the Effect of temperature on reverse biase of led?
As temperature increases, the reverse bias voltage of an LED also increases. This is due to the temperature-dependent nature of the semiconductor material used in the LED, which affects the bandgap energy and subsequently the reverse bias characteristics. It is important to consider and compensate for these temperature effects when designing LED circuits for reliable performance.
1. What are the two conditions under which a diode is operated?
A diode is typically operated under forward bias, where the anode is at a higher potential than the cathode, allowing current to flow, or under reverse bias, where the cathode is at a higher potential than the anode, preventing significant current flow.
Which of the following statements is (are) true about reverse bias breakdown due to impact ionization and Zener tunneling?
Reverse bias breakdown due to impact ionization is when electrons are accelerated by the electric field to such high speeds that they knock other electrons out of the atoms they collide with. This process releases a large amount of energy, which can cause the breakdown of the material. Zener tunneling is when the electric field is strong enough to cause the electrons to tunnel through the potential barrier. This process can also cause the breakdown of the material.
Why emitter bias circuit is called self bias?
The emitter bias circuit is called self-bias because the bias voltage across the emitter-resistor is based on the transistor's own characteristics. The bias voltage adjusts itself based on the varying collector current to stabilize the operating point of the transistor. It is a self-adjusting mechanism that helps maintain a stable bias point for the transistor.
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.
What are the different types of biasing?
Fixed Bias,Self Bias, Forward Bias, Reverse Bias
Characteristics of curve of an ideal diode with diagram?
0V forward bias knee voltage0 ohm forward bias resistance0A reverse bias currentinfinite ohm reverse bias resistanceno parasitic capacitance or inductance
What is the reverse bias diode?
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What are the two bias conditions for a diode?
The two bias conditions for a diode are forward and reverse
What are the bias conditions base collector junctions for a transistor to operate as a switch?
Reverse bias
Does diode flow current in reverse bias?
Diodes will have a small leakage current in reverse bias. In most cases, this current can be considered insignificant and ignored.
What will happen if no applied bias In forward bias and reverse bias?
If no forward or reverse bias is applied from outside then the diode or transistor(I'm not sure for which did you ask) is in internal equilibrium. thus there's a field created in each junction which prevents the flow of charges across it..
A zener diode is invariably used with?
Reverse bias
What is the voltage drop of an ideal diode?
forward bias 0 volts, reverse bias infinity volts.
What Is The Dependence Of Device Capacitance (C) On Applied Reverse Bias (V) For An Abrupt Junction Varactor Diode?
For an abrupt junction varactor diode, the device capacitance (C) inversely depends on the applied reverse bias voltage (V). As the reverse bias increases, the depletion region widens, leading to a decrease in capacitance. The relationship can be approximated by the equation ( C \propto V^{-1/2} ), indicating that capacitance decreases as the square root of the increase in reverse bias voltage. Thus, higher reverse bias results in lower device capacitance.
Why ammeter is connected in different way in forward and reverse bias zenner diode?
The ammeter is connected in different way in forward and reverse bias zenner diode. So that all of the board will work right going forward and reverse.
Forward bias and reverse bias?
forward bias is in the direction a junction or vacuum tube wants to conduct currentreverse bias is in the direction a junction or vacuum tube opposes conducting current
