What is the Behaviour of a pn junction?

Solution : When p-n junction is formed, the free electron on n-side diffuse over to p-side , they combine with holes and become neutral.Similarly holeson p-side diffuse over to n-side and combine with electrons become neutral. <

What are the characteristics of a junction diode?

VI characteristics of P-N junction diodes is a curve between the voltage and current through the circuit. Voltage is taken along the x-axis while the current is taken along the y-axis….V-I Characteristics of P-N Junction Diode

  • Zero bias.
  • Forward bias.
  • Reverse bias.

What is alloy diode?

[′a‚lȯi ¦jəŋk·shən ′dī‚ōd] (electronics) A junction diode made by placing a pill of doped alloying material on a semiconductor material and heating until the molten alloy melts a portion of the semiconductor, resulting in a pn junction when the dissolved semiconductor recrystallizes.

What is the function of P_N junction?

A p-n junction represents an electrical component with the function to allow an electric current in one direction (called the forward biased condition) and to block the current in the opposite direction (the reverse biased condition): a diode.

What is the Behaviour of a pn junction diode when it is forward biased?

When a junction diode is Forward Biased the thickness of the depletion region reduces and the diode acts like a short circuit allowing full circuit current to flow.

What is the Behaviour of pn junction under forward and reverse biasing?

This graph is for the dynamic Resistance of the junction in the forward bias. In the reverse bias the voltage increases in the reverse direction across the p-n junction, but no current due to the majority carriers, only a minimal leakage current flows. But at a certain reverse voltage p-n junction breaks in conduction.

What is a junction diode?

Junction diode is a semiconductor with n and p type materials that are chemically combined, forms a junction that allows conduction in one direction only.

How is a pn-junction diode fabricated by alloying?

Alloy Type or Fused Junction Diode: Such a diode is formed by first placing a P- type impurity (a tiny pellet of aluminium or some other P- type impurity) into the surface of an N-type crystal and heating the two until liquefaction occurs where the two materials meet.

What is static and dynamic resistance?

The static resistance which is calculated from the static ch. of doide is the dc resistance offered by the diode. dynamic ch. of the diode describes the diode’s behavior when the applied voltage is fluctuating,or ac, thus the dynamic resistace is simply the ac resistance offered by the diode.

Why does depletion region decreases in forward bias?

In a P-N junction diode, the width of the depletion region decreases in forward bias. This is due to the electrons being attracted by the positive terminal of the battery, and hence the negative ions disappear. Thus, the forward bias narrows the depletion region, due to the carriers from the battery terminals.

When a junction diode is reverse biased what causes current across the junction?

EXPLANATION: When the p-n junction is reverse biased, then the current across the junction is mainly due to the drifting of minority carriers.