PE_POWER DIODE

The p-region has a greater concentration of __________ as compared to the n-region in a P-N junction

• holes

• electrons

• both holes & electrons

• phonons

A p-type semiconductor material is doped with ____________ impurities whereas a n-type semiconductor material is doped with __________ impurities

• acceptor, donor

• acceptor, acceptor

• donor, donor

• donor, acceptor

In the p & n regions of the p-n junction the _________ & the ___________ are the majority charge carriers respectively.

• holes, holes

• electrons, electrons

• holes, electrons

• electrons, holes

The n-region has a greater concentration of _________ as compared to the p-region in a P-N junction diode.

• holes

• electrons

• both holes & electrons

• phonons

Which of the below mentioned statements is false regarding a p-n junction diode?

• Diode are uncontrolled devices

• Diodes are rectifying devices

• Diodes are unidirectional devices

• Diodes have three terminals

In the p & n regions of the p-n junction the _________ & the ___________ are the minority charge carriers respectively.

• holes, holes

• electrons, electrons

• holes, electrons

• electrons, holes

Lets assume that the doping density in the p-region is 10-9 cm-3 & in the n-region is 10-17cm-3, as such the p-n junction so formed would be termed as a

• p– n–

• p+ n–

• p– n+

• p+ n+

When a physical contact between a p-region & n-region is established which of the following is most likely to take place?

• Electrons from N-region diffuse to P-region

• Holes from P-region diffuse to N-region

• Both of the above mentioned statements are true

• Nothing will happen

Which of the following is true in case of an unbiased p-n junction diode?

• Diffusion does not take place

• Diffusion of electrons & holes goes on infinitely

• There is zero electrical potential across the junctions

• Charges establish an electric field across the junctions

Which of the following is true in case of a forward biased p-n junction diode?

• The positive terminal of the battery sucks electrons from the p-region

• The positive terminal of the battery injects electrons into the p-region

• The negative terminal of the battery sucks electrons from the p-region

• None of the above mentioned statements are true