Electronics and Communication Engineering - Exam Questions Papers

36. 

The fuse material used in electrical lines must have which one of the following properties?

A. High resistivity
B. Low conductivity
C. High melting point
D. Low melting point

Answer: Option D

Explanation:

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37. 

With respect to transmission parameters, which one of the following is correct?

A. A and B are dimensionless
B. B and C are dimensionless
C. A and D are dimensionless
D. B and D are dimensionless

Answer: Option C

Explanation:

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38. 

For detecting a sequence 1011 which is the correct state diagram representation.

A.
B.
C.
D. none of these

Answer: Option B

Explanation:

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39. 

In the circuit, shown in figure, V0 = Vi. The values of 1, m, n are: (x represents don't care conditions)

A. 0, 1, 1
B. ∞, x, x
C. x, ∞, x
D. 0, x, ∞

Answer: Option B

Explanation:

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40. 

In the design of a single mode step index optical fiber close to upper cut-off, the single mode operations is NOT preserved if

A. radius as well as operating wavelength are halved
B. radius as well as operating wavelength are doubled
C. radius is halved and operating wavelength is doubled
D. radius is doubled and operating wavelength is halved

Answer: Option B

Explanation:

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