Electronics and Communication Engineering - Electronic Devices and Circuits
Exercise : Electronic Devices and Circuits - Section 1
- Electronic Devices and Circuits - Section 1
- Electronic Devices and Circuits - Section 2
- Electronic Devices and Circuits - Section 3
- Electronic Devices and Circuits - Section 4
- Electronic Devices and Circuits - Section 5
- Electronic Devices and Circuits - Section 6
- Electronic Devices and Circuits - Section 7
- Electronic Devices and Circuits - Section 8
- Electronic Devices and Circuits - Section 9
- Electronic Devices and Circuits - Section 10
- Electronic Devices and Circuits - Section 11
- Electronic Devices and Circuits - Section 12
- Electronic Devices and Circuits - Section 13
- Electronic Devices and Circuits - Section 14
- Electronic Devices and Circuits - Section 15
- Electronic Devices and Circuits - Section 16
31.
A zener diode is used in
Answer: Option
Explanation:
Zener diode is used only in voltage regulator circuits.
32.
A particular green LED emits light of wavelength 5490, Å, the energy bandgap of the semiconductor material used there is .. h = 6.6 x 10-34 J sec.
Answer: Option
Explanation:
From Plank equation 
joule
to convert it into electron volt it will be divided by 1.6 x 10-19.
33.
In a zener diode
Answer: Option
Explanation:
When reverse voltage equals breakdown value it starts conducting and voltage does not increase further.
34.
In a bipolar transistor which current is largest
Answer: Option
Explanation:
Emitter current is larger, collector current is slightly less than emitter current and base current is very small.
35.
The v-i characteristics of a FET is shown in figure. In which region is the device biased for small signal amplification
Answer: Option
Explanation:
Small signal amplifier operation is in constant current region of characteristics.
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