In an n channel JFET, the gate is n type p type either n or p partially n & part

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Correct Answer

p type

Explanation

Since channel is n type gate must be p type.

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

3. 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

4. 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

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

7. 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

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

9. 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

10. The normal operation of JFET is
Options
A. constant voltage region
B. constant current region
C. both constant voltage and constant current regions
D. either constant voltage or constant current region

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