Electronics and Communication Engineering - Networks Analysis and Synthesis

1. 

In figure, the value of R should be

A. 12 Ω
B. 6 Ω
C. 3 Ω
D. 1.5 Ω

Answer: Option B

Explanation:

The resistance of parallel combination =


2. 

An RLC series circuit has R = 7.07 Ω, L = .707 H and C = 7.07 μF. At Half power frequencies the circuit impedance is likely to be

A. 7.07 Ω
B. 10 Ω
C. 14.14 Ω
D. 20 Ω

Answer: Option B

Explanation:

At half power frequency the circuit impedance is 2 times resistance.


3. 

In a series R, L, C circuit the impedance triangle is the same when XL < XC and XL > XC .

A. True
B. False

Answer: Option B

Explanation:

The quadrants are different.


4. 

The zinc can of a dry cell serves as positive terminal.

A. True
B. False

Answer: Option B

Explanation:

Zinc can serves as negative terminal.


5. 

Two similar coils have self inductance of 1 mH each. Coefficient of coupling is 0.5. The mutual inductance M is

A. 0.25 mH
B. 0.5 mH
C. 0.707 mH
D. 1 mH

Answer: Option B

Explanation:

M = kL1L2


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