Network Theory And Analysis - Study Mode

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[#91] In the circuit shown, the switch SW is thrown from position A to position B at time t = 0. The energy taken from the 3 V source to charge the 0.1 µF capacitor form 0 V to 3 V is

(A) 0.3

(B) 0.45

(C) 0.9

(D) 3

Correct Answer

(C) 0.9

[#92] A transient current in a network is i(t) = 2e -t - e -5t , t ≥ 0, the pole-zero configuration of I(s) is

(A) poles : 1, 5 zeros : 9

(B) poles : -1, -5 zeros : -9

(C) poles : 2, -1 zeros : -1, -5

(D) poles : 2, -1 zeros : 1, 5

Correct Answer

(B) poles : -1, -5 zeros : -9

[#93] In the transformer shown in the figure below, the inductance measured across the terminal 1 and 2 was 4 H with open terminals 3 and 4. It was 3 H when the terminal 3 and 4 were short circuited. The coefficient of coupling would be

(A) 1

(B) 0.0707

(C) 0.5

(D) indeterminate due to insufficient data

Correct Answer

(C) 0.5

[#94] The value of R (in ohms) required for maximum power transfer in the network shown in the figure is

(A) 2

(B) 4

(C) 8

(D) 16

Correct Answer

(C) 8

[#95] In the following circuit, switch K is thrown from position A to position B at time t = 0, the currenthaving previously reached its steady state: The current i(t) after switching will be

(A) 5e -5t

(B) 4e -5t

(C) 3e -5t

(D) e -5t

Correct Answer

(D) e -5t