WBUT 2009: Circuit Theory & Networks (Paper Code: EE301) Question Paper

CS/B.Tech(ECE,EE,EEE,IC,BME,PWE,CSE,IT)/SEM-3/EE-301/2009-10

2009
CIRCUIT THEORY & NETWORKS

Time Allotted:3 Hours Full Marks:70
The Figures in the margin indicate full marks.
Candidates are requested to give their answer in their own words as far as practicable.

Group -A
(Multiple Choice Type Questions)

1. Choose the correct alternatives for any ten of the following:

i) Laplace Transform analysis gives
(a) Time domain response only
(b) Frequency domain response only
(c) both (a) & (b)
(d) real response only

ii) If a function is shifted by 'T', then it is correctly represented as
(a) [tex]f(t - T)u(t)[/tex]
(b) [tex]f(t - T)u(t - T)[/tex]
(c) [tex]f(t)u(t - T)[/tex]
(d) [tex](t - T)f(t - T)[/tex]

iii) The equivalent resistance between x & y of the figure shown below is

(a) 30Ω

(b) 50Ω

(c) 60Ω

(d) 10Ω

iv) If f(t) is an even function, then its Fourier transform F(jw) is given by

(a) [tex]2\int\limits_0^\infty {f(t)\cos wtdt}[/tex]

(b) [tex]\int\limits_0^\infty {f(t)\cos wtdt}[/tex]

(c) [tex]2\int\limits_0^\infty {f(t)\sin wtdt}[/tex]

(d) [tex]\int\limits_0^\infty {f(t)\sin wtdt}[/tex]

v) The Thevenin's equivalent resistance of the given circuit with respect to the terminals A&B is equal to

(a) 2.66Ω