Electronics and Communication Engineering - Electronic Devices and Circuits

36. 

In a p-n-p transistor the main current carriers and the mechanism of flow respectively are

A. electrons, drift
B. holes, drift
C. holes, diffusion
D. electrons, diffusion

Answer: Option C

Explanation:

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37. 

The 6 V zener diode shown in figure has zero zener resistance and a knee current of 5 mA. The minimum value of R, so that the voltage across it does not fall below 6 V is

A. 1.2 kΩ
B. 80 Ω
C. 50 W
D. 0

Answer: Option B

Explanation:

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38. 

Secondary emission occurs in

A. diode
B. triode
C. tetrode
D. pentode

Answer: Option C

Explanation:

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39. 

In common base connection, the output characteristics of a bipolar junction transistor is drawn between

A. IC and VCB
B. IC and VCE
C. IE and VCB
D. IE and VCE

Answer: Option A

Explanation:

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40. 

In fabricating silicon BJT in ICs by the epitaxial process, the number of diffusions used is usually

A. 2
B. 3
C. 4
D. 6

Answer: Option D

Explanation:

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