Deemed University 2009 A.M.I.E.T.E Electronics & Communication Engineering CIRCUIT THEORY & DESIGN – ET (OLD SCHEME) in ELECTRONICS & COMM ENGG - Question Paper

AMIETE – ET (OLD SCHEME)

Code: AE08 Subject: CIRCUIT THEORY & DESIGN
Time: three Hours Max. Marks: 100

NOTE: There are nine ques. in all.
· ques. one is compulsory and carries 20 marks. ans to Q. 1. must be written in the space given for it in the ans book supplied and nowhere else.
· Out of the remaining 8 ques. ans any 5 ques.. every ques. carries 16 marks.
· Any needed data not explicitly given, may be suitably presumed and said.



Q.1 select the accurate or the best option in the following: (2 10)

a.


In the circuit shown, I is provided by

(A) –2A.
(B) 2A.
(C) 3A.
(D) 4A.


b. A series RLC circuit has R=10,000 ohms, L=10mH, C=1µF. The resonant frequency ?o(rad/sec) is provided by
(A) . (B) .
(C) . (D) .

c. In the circuit shown, steady state is reached
with S-open. S is closed at t=0 At t= , the voltage across L is provided by

(A) 0.
(B) 6.
(C) –6.
(D) 2.


d. An instantaneous voltage of is applied across an element and the instantaneous power is observed to be Then the element is a
(A) Resistor. (B) Inductor.
(C) Capacitor. (D) None of the above.

e. A system function . The system is at rest for t<0. i(t)=unit step, is provided at t = 0 then v(t) for t > 0 is provided by

(A) . (B) .
(C) . (D) .


f. The current i(t), through a 10O resistor in series with an inductance, is provided by Amperes. The RMS value of the current in the circuit is
(A) . (B) .
(C) 5A. (D) 11A.

Earning:   Approval pending.