Frequent question: What is electric field in pn junction?

Direction of the electric field in P-N junction diode is. A. From the P side to the N side. … The depletion region is formed between the p-type and n-type material due to which the electric field is developed. The direction of the electric field is from the positive charges to the negative charges.

What is junction electric field?

At the p-n junction, the “built-in” electric field and the applied electric field are in the same direction. When these two fields add, the resultant larger electric field is in the same direction as the “built in” electric field and this creates a thicker, more resistive depletion region.

How electric field is produced in pn junction?

Movement of electrons to the p-type side exposes positive ion cores in the n-type side while movement of holes to the n-type side exposes negative ion cores in the p-type side, resulting in an electron field at the junction and forming the depletion region.

What is the direction of electric field in pn junction diode?

Explanation:The direction of electric field is from N-side to P-side in PN junction diode.

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What is electric field intensity?

A measure of the force exerted by one charged body on another. Imaginary lines of force or electric field lines originate (by convention) on positive charges and terminate on negative charges.

What is electric field formula?

Electric field can be considered as an electric property associated with each point in the space where a charge is present in any form. An electric field is also described as the electric force per unit charge. The formula of electric field is given as; E = F /Q.

Why an electric field is produced in a depletion region of a pn junction?

Light travels in packets of energy called photons. The generation of electric current happens inside the depletion zone of the PN junction. … The hole created by the dislodged electron is attracted to the negative charge of N-type material and migrates to the back electrical contact.

Why the direction of electric field is from P side to N side?

Due to the formation of static charges on either side of the boundary, an electric field develops in the direction from the N side to the P side.

What is the use of PN junction diode?

The junction which is the p-n junction diode can be used as a photodiode, the diode which is sensitive to the light when the configuration of the diode is reverse-biased. It can be used as a solar cell. When the diode is forward-biased then it can be used in LED lighting applications.

Why do we use Zener diode?

The Zener voltage across a diode remains constant over a wide range of Zener current. … A Zener diode permits Zener current, Iz, to flow when the voltage is above the specified Zener voltage. Thus, a Zener diode can be used for voltage detection by sensing Zener current with some other device.

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Why pn junction is called diode?

A diode is called a diode because it has two distinct electrodes (i.e. terminals), called the anode and the cathode. A diode is electrically asymmetric because current can flow freely from the anode to the cathode, but not in the other direction.