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Electronics and Communication Engineering - Electromagnetic Field Theory

Exercise : Electromagnetic Field Theory - Section 8
26.
An intrinsic semiconductor (intrinsic electron density = 1016 m-3) is deped with donors to a level of 1022 m-3. What is the hole density assuming all donors to be ionized?
107 m-3
108 m-3
1010 m-3
106 m-3
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
The capacitor filter provides poor voltage regulation because
the increase in ripple with load current causes a decrease in average voltage
the increase in ripple with load current causes a increase in average voltage
filter promotes ripple at peak voltage
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
If Vr is the reverse voltage across a graded P-N Junction, then the junction capacitance cj is proportional to
(Vr)2
(Vr)n
(Vr)-n
(Vr)3/2
Answer: Option
Explanation:
No answer description is available. Let's discuss.
29.
In the schematic representation of bipolar junction transistor, the direction of arrow shows the direction of flow of
holes
electrons
holes in pnp and electrons in npn
electrons in pnp and holes in npn
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.
Conductivity σ, mobility μ and Hall coefficient KH are related as
μ = σKH
σ = μKH
KH = μσ
KH =(μσ)1.1
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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