Electronics and Communication Engineering - Exam Questions Papers

1. 

Which of the following uses 'transferred electron effect' for production of microwaves?

A. Silicon
B. Germanium
C. Metal-semiconductor junction
D. Gallium Arsenide

Answer: Option D

Explanation:

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

2. 

The figures shows the symbol of

A. p channel depletion MOSFET
B. p channel enhancement MOSFET
C. complementary MOSFET
D. p channel JFET

Answer: Option A

Explanation:

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3. 

The spectral range of a band pass signal extends from 10 MHz to 10.4 MHz. What is the minimum sampling frequency required for reconstruction?

A. 20 MHz
B. 20.8 MHz
C. 20.4 MHz
D. 0.8 MHz

Answer: Option D

Explanation:

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4. 

All poles and zeros of a driving point immittance function of an L-C network

A. should lie on the jω axis
B. should lie on the +ve real axis
C. should lie on the - ve real axis
D. can lie anywhere in s-plane

Answer: Option A

Explanation:

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5. 

In 8085 microprocessor, the interrupt enable flip-flop is reset by

A. DI instruction only
B. system RESET only
C. interrupt acknowledgment only
D. all of the above

Answer: Option D

Explanation:

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