Electronics and Communication Engineering - Electronic Devices and Circuits

6. 

Gold is often diffused into silicon P-N junction devices to

A. increase recombination rate
B. reduce recombination rate
C. make silicon a direct gap semiconductor
D. make silicon semimetal

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

7. 

In a solar cell, the photovoltaic voltages is the voltage at which the resultant current is

A. positive
B. zero
C. negative
D. rated current

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

8. 

The forbidden energy gap between the valence band and conduction band will be wide in case of

A. semiconductors
B. all metals
C. good conductors of electricity
D. insulators

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

9. 

At 0 K the forbidden energy gap in intrinsic semi conductor is about

A. 10 eV
B. 6 eV
C. 1 eV
D. 0.2 eV

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

10. 

The resistance of a metallic wire would

A. increase as the operating frequency increase
B. decrease as the operating frequency increase
C. remain unaffected on increasing the operating frequency
D. first increase then decrease

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.