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Electronics and Communication Engineering - Electromagnetic Field Theory

Exercise : Electromagnetic Field Theory - Section 5
46.
Fermi level in intrinsic semiconductor is at the centre of forbidden energy band.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
47.
In a photo transistor the photocurrent is
emitter base junction
collector base junction
collector
either (a) or (b)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
48.
In photoelectric emission the maximum kinetic energy of emitted electron is proportional to
f
f
f2
f3
Answer: Option
Explanation:
No answer description is available. Let's discuss.
49.
In a P-type semiconductor, the conductivity due to holes (= σP) is equal to e = charge of hole, μP = hole mobility, P = hole concentration,
P.e.μP
Answer: Option
Explanation:
No answer description is available. Let's discuss.
50.
Hall effect is observed in a specimen when it is carrying current and is placed in a magnetic field. The resulting electric field inside the speciment will be in
direction normal to both current and magnetic field
the direction of current
direction antiparallel to magnetic field
an arbitrary direction depend upon conductivity
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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