ELECTRICAL ENGINEERING MCQs

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

A) holes

B) electrons

C) both holes & electrons

D) phonons


2. A p-type semiconductor material is doped with impurities whereas a n-type
semiconductor material is doped with impurities

A) acceptor, donor

B) acceptor, acceptor

C) donor, donor

D) donor, acceptor


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

A) holes, holes

B) electrons, electrons

C) holes, electrons

D) electrons, holes


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

A) holes

B) electrons

C) both holes & electrons

D) phonons


5. Which of the below mentioned statements is false regarding a p-n junctiondiode?

A) Diode are uncontrolled devices

B) Diodes are rectifying devices

C) Diodes are unidirectional devices

D) Diodes have three terminals


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

A) holes, holes

B) electrons, electrons

C) holes, electrons

D) electrons, holes


7. 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

A) p- n-

B) p+ n-

C) p- n+

D) p+ n+


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

A) Electrons from N-region diffuse to P-region

B) Holes from P-region diffuse to N-region

C) Both of the above mentioned statements are true

D) Nothing will happen


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

A) Diffusion does not take place

B) Diffusion of electrons & holes goes on infinitely

C) There is zero electrical potential across the junctions

D) Charges establish an electric field across the junctions


10. The arrow direction in diode symbol indicates

A) Direction of electron flow

B) Direction of holes flow

C) Opposite to Direction of hole flow

D) none of the above


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