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Electronics and Communication Engineering - Electromagnetic Field Theory

Exercise : Electromagnetic Field Theory - Section 9
26.
Which of the following semi-conductor has forbidden energy gap less 1 eV?
Sulphur
Phosphorous
Germanium
Carbon
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
In the vacuum diode equation ib = keb1.5, the current is
temperature limited current
space charge limited current
any of the above
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
Thermosetting polymers are
injection moulded
extruded
cast moulded
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
29.
Which of these is used in seven segment display?
PIN diode
LED
Photo diode
Tunnel diode
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.
The current in a p-n junction diode with V volts applied in p region relative to n region (where I0 is reverse saturation current, m is ideality factor, k is Boltzmann's constant, T is absolute temp and q is charge on electron) is
I0 (e-qV/mkT - 1)
I0 e-qV/mkT
I0 (eqV/mkT)
I0 (eqV/mkT - 1)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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