Electronics and Communication Engineering - Electronic Devices and Circuits

31. 

How is an N-channel junction Field Effect Transistor operated as an amplifier?

A. With a forward bias gate source junction
B. With a reverse bias gate-source junction
C. With a open gate source junction
D. With a shorted gate source junction

Answer: Option B

Explanation:

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32. 

The Ebers-moll equation for IE in CB configuration is given by

A. IE = anICIEC0
B. IE = aIIC + IC0
C. IE = anIC + IC0(eqVEB/KT-1)
D. IE = aIIC + IE0(eqVEB/KT - 1)

Answer: Option D

Explanation:

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33. 

Ferrites are

A. hard materials
B. brittle materials
C. not easily machinable
D. materials with all above properties

Answer: Option D

Explanation:

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34. 

The merging of a hole and an electron is called

A. recombination
B. covalent bonding
C. thermal union
D. none of the above

Answer: Option A

Explanation:

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35. 

Which of the following semiconductor has the highest melting point?

A. Germanium
B. Silicon
C. Gallium arsenide
D. Lead sulphide

Answer: Option D

Explanation:

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