# When signed numbers are used in binary arithmetic, then which one of the following notations would have unique representation for zero

1.  Sign-magnitude

2.  1’s complement

3.  2’s complement

4.  9’s complement

4

2’s complement

Explanation :
No Explanation available for this question

# Which of the following pairs of types of wave propagation and associated property are correctly matched 1. Surface wave……………..Vertical polarization 2. Duct propagation…………..super refraction 3. Sky wave……..Critical frequency Select the correct answer using the codes given below:

1.  1, 2 and 3

2.  1 and 2

3.  1 and 3

4.  2 and 3

4

2 and 3

Explanation :
No Explanation available for this question

1.  is faster

2.  is more accurate

3.  used fewer gates

4.  costs less

4

is faster

Explanation :
No Explanation available for this question

# The open loop transfer function of a unity feedback control system is given by The centroid and angle of root locus asymptotes are respectively

1.  Zero and + 90°, - 90°

2.   -2/3 and + 60°, -60°

3.   Zero land + 120°, -120°

4.   -2/3 and -90° and -90°, + 90°

4

Zero and + 90°, - 90°

Explanation :
No Explanation available for this question

# Two carriers 40 MHz and 80 MHz respectively are frequency modulated by a signal of frequency 4 KHz, such that the bandwidths of the FM signal in the two cases are the same. The peak deviation in the two cases are in the ratio of

1.  1:4

2.  1:2

3.  1:1

4.  2:1

4

1:2

Explanation :
No Explanation available for this question

# The logic circuit given below converts a binary code Y1 Y2 Y3 into

1.  Excess-3 code

2.  Gray code

3.  BCD code

4.  Hamming code

4

Gray code

Explanation :
No Explanation available for this question

# . A system with the characteristic equation s4+2s3+11s2+18s+18=0 will have closed loop poles such that

1.   All poles lie in the left half of the s-plane

2.   All poles lie in the right half of the s-plane

3.  Two poles lie symmetrically on the imaginary axis of the s-plane

4.  No pole lie on the imaginary axis of the s-plane

4

Two poles lie symmetrically on the imaginary axis of the s-plane

Explanation :
No Explanation available for this question

# Which one of the following is the advantage of base modulation over collector modulation of a transistor Class C amplifier

1.   Requires lower modulation power

2.  Higher power output per transistor

3.  Better efficiency

4.  Better linearity

4

Requires lower modulation power

Explanation :
No Explanation available for this question

# The greatest negative number which can be stored in computer that has 8-bit work length and uses 2’s complement arithmetic is

1.  -256.

2.  -255

3.  -128

4.  -127

4

-128

Explanation :
No Explanation available for this question

1.  6 fm

2.   fm

3.  2 fm

4.  10 fm

4