The number of doped regions in PIN diode is 1 2 3 1 or 2 A PIN diode has p and n

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Question
The number of doped regions in PIN diode is
Options
A. 1
B. 2
C. 3
D. 1 or 2

Correct Answer

2

Explanation

A PIN diode has p and n doped regions separated by intrinsic layer.

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2. A potential of 7 V is applied to a silicon diode. A resistance of 1 K ohm is also in series with the diode. The current is
Options
A. 7 mA
B. 6.3 mA
C. 0.7 mA
D. 0

3. At very high temperatures the extrinsic semi conductors become intrinsic because
Options
A. drive in diffusion of dopants and carriers
B. band to band transition dominants over impurity ionization
C. impurity ionization dominants over band to band transition
D. band to band transition is balanced by impurity ionization

4. The word enhancement mode is associated with
Options
A. tunnel diode
B. MOSFET
C. JFET
D. photo diode

5. In a bipolar transistor the barrier potential
Options
A. 0
B. a total of 0.7 V
C. 0.7 V across each depletion layer
D. 0.35 V

8. A silicon (PN) junction at a temperature of 20�C has a reverse saturation current of 10 pico Ampere. The reverse saturation current at 40�C for the same bias is approximately.
Options
A. 30 pA
B. 40 pA
C. 50 pA
D. 60 pA

9. Ferrite have
Options
A. low copper loss
B. low eddy current loss
C. low resistivity
D. higher specific gravity compared to iron

10. A particular green LED emits light of wavelength 5490, �, the energy bandgap of the semiconductor material used there is .. h = 6.6 x 10^-34 J sec.
Options
A. 2.26 eV
B. 1.98 eV
C. 1.17 eV
D. 0.74 eV

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