Electronics and Communication Engineering - Electronic Devices and Circuits

1. 

The depletion layer in a reverse biased p-n junction is due to the presence of

A. electrons
B. holes
C. both electrons and holes
D. immobile ions

Answer: Option D

Explanation:

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2. 

Which materials find application in MASER?

A. Diamagnetic
B. Paramagnetic
C. Ferromagnetic
D. Ferrimagnetic

Answer: Option A

Explanation:

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3. 

An electrically neutral semiconductor has

A. no free charges
B. no majority carriers
C. no minority carriers
D. equal number of positive and negative charges

Answer: Option D

Explanation:

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4. 

Magnetic recording tape is most commonly made from

A. small particles of iron
B. silicon iron
C. ferric-oxide
D. silver nitrate

Answer: Option C

Explanation:

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5. 

The circuit shown in the figure is best described as a

A. bridge rectifier
B. ring modulator
C. frequency discriminator
D. voltage doubler

Answer: Option D

Explanation:

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