Electronics and Communication Engineering - Digital Electronics

31. 

The no. of FF required and the maximum decimal no. of a MOD-12 counter is

A. 12, 12
B. 4, 11
C. 3, 6
D. 4, 10

Answer: Option B

Explanation:

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32. 

In a four variable K map eight adjacent cells give

A. single variable term
B. two variable term
C. three variable term
D. four variable term

Answer: Option A

Explanation:

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33. 

The MOS symbol shown indicates that

  1. It is depletion type
  2. It is enhancement type
  3. It is channel
  4. It is P-channel
  5. Electrons flow from s to D
  6. Holes flow from D to s
The true statements are

A. 1, 3, 6
B. 1, 3, 5
C. 2, 4, 6
D. 2, 3, 5

Answer: Option D

Explanation:

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34. 

In a digital counter the number of flip-flops is

A. always 2
B. always even
C. always odd
D. equal to the number of bits required in the final binary count

Answer: Option C

Explanation:

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35. 

Assertion (A): Gray code is used in shaft position encoding.

Reason (R): In gray code only a single bit change occurs when going from one code to another.

A. Both A and R are correct and R is correct explanation of A
B. Both A and R are correct but R is not correct explanation of A
C. A is true, R is false
D. A is false, R is true

Answer: Option A

Explanation:

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