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1. In a series of RLC circuit, R=10 ohm, L=100 mH, C=10 micro F. The selectivity of the circuit is:

A. 5
B. 1000 rad/sec
C. 15.92 Hz
D. 0.2

_________________________

2. The impulse response h[n] of a linear
time-invariant system is given byh[n] = u[n + 3] + u[n - 2] -
2u[n-7]where u[n] is the unit step sequence. The above system is

A. stable but not causal
B. stable and causal
C. causal but unstable
D. unstable and not causal

_________________________

3. In what range should Re(s) remain so that the Laplace transform of the function e(a+2)t+5 exits?

A. Re (s) > a + 2
B. Re (s) > a + 7
C. Re (s) < 2
D. Re (s) > a + 5

_________________________

4. A device with input x(t) and output y(t) is characterized by:   y(t) = x^2(t).

An FM signal with frequency deviation of 90 kHz and modulating signal
bandwidth of 5 kHz is applied to this device. The bandwidth of the
output signal is

A. 370 kHz
B. 190 kHz
C. 380 kHz
D. 95kHz

_________________________

5. The cascade amplifier is a multistage configuration of

A. CC-CB
B. CE-CB
C. CB-CC
D. CE-CC

Edited by Arpita - 15Feb2007 at 12:38pm

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Arpita Groupie Joined: 04Jan2007 Online Status: Offline Posts: 73	Topic: Sample questions of ECE Posted: 15Feb2007 at 12:38pm
	1. In a series of RLC circuit, R=10 ohm, L=100 mH, C=10 micro F. The selectivity of the circuit is: A. 5 B. 1000 rad/sec C. 15.92 Hz D. 0.2 _________________________ 2. The impulse response h[n] of a linear time-invariant system is given byh[n] = u[n + 3] + u[n - 2] - 2u[n-7]where u[n] is the unit step sequence. The above system is A. stable but not causal B. stable and causal C. causal but unstable D. unstable and not causal _________________________ 3. In what range should Re(s) remain so that the Laplace transform of the function e(a+2)t+5 exits? A. Re (s) > a + 2 B. Re (s) > a + 7 C. Re (s) < 2 D. Re (s) > a + 5 _________________________ 4. A device with input x(t) and output y(t) is characterized by: y(t) = x^2(t). An FM signal with frequency deviation of 90 kHz and modulating signal bandwidth of 5 kHz is applied to this device. The bandwidth of the output signal is A. 370 kHz B. 190 kHz C. 380 kHz D. 95kHz _________________________ 5. The cascade amplifier is a multistage configuration of A. CC-CB B. CE-CB C. CB-CC D. CE-CC Edited by Arpita - 15Feb2007 at 12:38pm
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Neha Agarwal Groupie Joined: 04Jan2007 Online Status: Offline Posts: 59	Posted: 15Feb2007 at 12:41pm
	Ans for above questions...... 1-D 2-A 3-A 4-C 5-B
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mastro Newbie Joined: 05Jun2007 Online Status: Offline Posts: 12	Posted: 05Jun2007 at 6:29am
	Neha... can you elaborate the answers
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bero Newbie Joined: 06Sep2007 Online Status: Offline Posts: 1	Posted: 30Oct2007 at 6:20am
	what is the question?
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nitin0108 Newbie Joined: 11Dec2007 Location: Ireland Online Status: Offline Posts: 1	Posted: 11Dec2007 at 8:42pm
	1. In a series of RLC circuit, R=10 ohm, L=100 mH, C=10 micro F. The selectivity of the circuit is: A. 5 B. 1000 rad/sec C. 15.92 Hz D. 0.2 _________________________ 2. The impulse response h[n] of a linear time-invariant system is given byh[n] = u[n + 3] + u[n - 2] - 2u[n-7]where u[n] is the unit step sequence. The above system is A. stable but not causal B. stable and causal C. causal but unstable D. unstable and not causal _________________________ 3. In what range should Re(s) remain so that the Laplace transform of the function e(a+2)t+5 exits? A. Re (s) > a + 2 B. Re (s) > a + 7 C. Re (s) < 2 D. Re (s) > a + 5 _________________________ 4. A device with input x(t) and output y(t) is characterized by: y(t) = x^2(t). An FM signal with frequency deviation of 90 kHz and modulating signal bandwidth of 5 kHz is applied to this device. The bandwidth of the output signal is A. 370 kHz B. 190 kHz C. 380 kHz D. 95kHz _________________________ 5. The cascade amplifier is a multistage configuration of A. CC-CB B. CE-CB C. CB-CC D. CE-CC
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