Exercise: Electronic Devices And Circuits

Questions for: Electronic Devices And Circuits

For a full wave bridge rectifier supplied with 50 Hz a.c., the lowest ripple frequency will be
A:
50 Hz
B:
100 Hz
C:
200 Hz
D:
400 Hz
Answer: B
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The maximum rectification efficiency in case of full wave rectifier is
A:
100%
B:
81.2%
C:
66.6%
D:
40.6%
Answer: B
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Given that the band gap of cadmium sulphide is 2.5 eV, the maximum photon wavelength, for e--hole pair generation will be
A:
5400 mm
B:
540 mm
C:
5400 Å
D:
540 Å
Answer: C
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The relation between plate current and plate voltage of a vacuum diode is called
A:
Richardson Dushman equation
B:
Langmuir Child law
C:
Ohm's law
D:
Boltzmann's law
Answer: B
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Zener diode is invariably used with
A:
forward bias
B:
reverse bias
C:
either (a) or (b)
D:
zero bias
Answer: B
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