Electronics and Communication Engineering - Electronic Devices and Circuits

16. 

In order to achieve good stabilization in potential divider method current I1 through R1 and R2 should be

A. I1 > 20 IB
B. I1 > 15 IB
C. I1 < 5 IB
D. I1 > 10 IB

Answer: Option D

Explanation:

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

17. 

A sample of N type semiconductor has electron density of 6.25 x 108/cm2 at 300 K. If the intrinsic concentration of carriers in this sample is 2.5 x 1013/cm3 at this temperature, the hole density works out to be

A. 106/cm3
B. 108/cm3
C. 1010/cm3
D. 10l2/cm3

Answer: Option B

Explanation:

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

18. 

Addition of 0.3 to 3.5% silicon to iron

A. increases the electrical resistivity of iron
B. decreases the electrical resistivity of iron
C. does not change electrical resistivity of iron
D. silicon can't be added with iron

Answer: Option A

Explanation:

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

19. 

A bistable multivibrator

A. has no stable state
B. has one stable state
C. has two stable state
D. none of the above

Answer: Option C

Explanation:

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

20. 

Transconductance indicates the

A. control of output voltage by input voltage
B. control of output current by input voltage
C. control of input voltage by output current
D. control of input current by input voltage

Answer: Option B

Explanation:

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