Electronics and Communication Engineering - Networks Analysis and Synthesis

1. 

A choke coil of resistance R and inductance L is shunted by capacitor C. The dynamic resistance is

A. R/LC
B. C/RL
C. L/RC
D. 1/RLC

Answer: Option C

Explanation:

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2. 

In an LC immittance H (s)

A. the slope of dH (jω)/dω is always negative
B. the slope of dH (jω)/dω is always positive
C. the slope of dH (jω)/dω may be positive or negative
D. the slope of dH (jω)/dω is constant

Answer: Option B

Explanation:

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3. 

The response shown in figure is

A. over damped
B. critically damped
C. under damped
D. either (a) or (c)

Answer: Option C

Explanation:

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4. 

The polar plot of P (jω) = 45° as ω varies from -∞ to ∞ is

A. a straight line parallel to x-axis
B. a straight line parallel to y-axis
C. a line passing through origin and inclined at 45°
D. a line in first quadrant passing through origin and inclined at 45° to positive x-axis

Answer: Option B

Explanation:

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5. 

Assertion (A): A graph is planar if it has a dual.

Reason (R): The dual of a graph can be found by window dot method.

A. Both A and R are true and R is correct explanation of A
B. Both A and R are true and R is not the correct explanation of A
C. A is true but R is false
D. A is false but R is true

Answer: Option C

Explanation:

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