21-30 Flashcards
1
Q
- Which of the following is the pentavalent doping element?
A
B. Bismuth
2
Q
- The JFET is
A
D. Answers A and B
(A unipolar device, voltage control device)
3
Q
- Which among the following is the most commonly used semiconductor?
A
A. Silicon
4
Q
- What happens to the resistance of a pure semiconductor when heated?
A
B. The resistance decreases
5
Q
- How many valence electrons does a pentavalent impurity have?
A
C. 5
6
Q
- For a certain JFET, loss is 10nA at VGS=10V, the input resistance is:
A
D. 1000 M oms
7
Q
- what is the effect of the temperature on the recombination rate of electrons in electronic circuits?
A
B. Recombination rate decreases with increase in the temperature
8
Q
- Which of the following is wrong about solar cell electronic devices?
A
A. Solar cell responsivity is directly proportional to the wavelength of light.
9
Q
- If the peak voltage on a centre tapped full wave rectifier circuit is 5V and diode cut in voltage is 0.7. The peak inverse voltage on diode is.
A
D. 10.7 V
10
Q
- How many valence electron does a pentavalent impurity have?
A
C. 5
