Exercise: Electronic Devices And Circuits

Questions for: Electronic Devices And Circuits

Hystresis loss least depends on
A:
frequency
B:
magnetic field intensity
C:
volume of the material
D:
grain orientation of material
Answer: D
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The turn off time of a bipolar transistor is about
A:
0.5 ns
B:
10 ns
C:
70 ns
D:
150 ns
Answer: C
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Consider the following statement associated with bipolar junction transistor and JFET
  1. The former has higher input impedance than the later
  2. The former has higher frequency stability than the later
  3. The later has lower noise figure than the former
  4. The later has higher power rating than the former.
Of these statements
A:
1 and 2 are correct
B:
2 and 3 are correct
C:
3 and 4 are correct
D:
1 and 4 are correct
Answer: B
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Figure shows small signal common base transistor circuit.The current source I and resistor R on the output side are
A:
ie and re
B:
ie and (1 - a)re
C:
(1 - a)ie and (1 - a)re
D:
a ie and re
Answer: D
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A metal loses electrons at room temperature.
A:
True
B:
False
C:
D:
Answer: B
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