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97.

An angle modulated signal is given by
s(t) = cos2π(2×10⁶t + 30sin150t + 40cos150t)
The maximum frequency and phase deviations of s(t) are [2 marks]
(a) 10.5 KHz, 140π rad
(b) 6 KHz, 80π rad
(c) 10.5 KHz, 100π rad
(d) 7.5 KHz, 100π rad

asked in Electronics and Communication Engineering, 2002

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98.

The system with the open loop transfer function
G(s)H(s) = 1/[s(s²+s+1)] has a gain margin of [2 marks]
(a) - 6 dB
(b) 0 dB
(c) 3.5 dB
(d) 6 dB

asked in Electronics and Communication Engineering, 2002

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99.

The characteristic polynomial of a system is
q(s) = 2s⁵ + s⁴ + 4s³ + 2s² + 2s + 1. The system is [2 marks]
(a) stable
(b) marginally stable
(c) unstable
(d) oscillatory

asked in Electronics and Communication Engineering, 2002

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100.

The transfer function of a system is G(s) = 100/[(s+1)(s+100)]. For a unit step input to the system the approximate settling time for 2% criterion is
[2 marks]
(a) 100 sec
(b) 4 sec
(c) 1 sec
(d) 0.01 sec

last reply by CpjJwWHV • 10 years ago • asked in Electronics and Communication Engineering, 2002

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101.

The system shown in Figure remains stable when

[2 marks]
(a) k < - 1
(b) - 1 < k < 1
(c) 1 < k < 3
(d) k > 3

asked in Electronics and Communication Engineering, 2002

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102.

Consider the following assembly language program.

The execution of the above program in an 8085 microprocessor will result in [2 marks]
(a) an output of 87H at PORT1
(b) an output of 87H at PORT2
(c) infinite looping of the program execution with accumulator data remaining at 00H
(d) infinite looping of the program execution with accumulator data alternating between 00H and 87H

asked in Electronics and Communication Engineering, 2002

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