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Electronics and Communication Engineering - Electromagnetic Field Theory

Exercise : Electromagnetic Field Theory - Section 4
11.
What is the effect of cut in voltage on the wave form of output as compared to input in a semiconductor diode?
The duration of output waveform is less than 180°
Output voltage is less than input voltage
Output voltage is more than input voltage
Both (a) and (b)
Answer: Option
Explanation:

Since the duration of output waveform is less than 180°, output voltage is less than input voltage.

12.
As temperature increases the number of free electrons and holes in an intrinsic semiconductor
increases
decreases
remains the same
may increase or decrease
Answer: Option
Explanation:

Increase of temperature increases conductivity of semiconductors.

13.
At room temperature kT = 0.03 eV.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.

Assertion (A): A JFET behaves as a resistor when VGS < VP.

Reason (R): When VGS < VP, the drain current in a JFET is almost constant.

Both A and R are true and R is correct explanation of A
Both A and R are true but R is not a correct explanation of A
A is true but R is false
A is false but R is true
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
In a reverse biased P-N junction, the current through the junction increases abruptly at
zero voltage
1.2 V
0.72 V
breakdown voltage
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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