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in reverse bais negative terminal of battery is connected to p section and positive terminal to n section that arrangement is called reverse bais.



Answer given by Sehdev Kumar B.Teh. 1st year
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Kyleigh Jacobs

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3y ago

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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.

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