Electronics and Communication Engineering - Electronic Devices and Circuits

11. 

Pentavalent impurity creates n type semiconductor.

A. True
B. False

Answer: Option A

Explanation:

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12. 

When a BJT is operated under saturated condition

A. both junctions are forward biased
B. both junctions are reverse biased
C. CB junction is forward biased and EB junction is reverse biased
D. EB junction is forward biased and CB junction is reverse biased

Answer: Option A

Explanation:

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13. 

Indium, aluminium, arsenic are all p type impurities.

A. True
B. False

Answer: Option B

Explanation:

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14. 

As the temperature of an intrinsic semiconductor material is increased

A. additional holes are created in the conduction band
B. protons get excited
C. protons acquire charge
D. energy of the atom is increased

Answer: Option D

Explanation:

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15. 

Hall coefficient KH and charge density r are related as

A. KH =
B. KH = r
C. KH =
D. KH = (r)1.2

Answer: Option A

Explanation:

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