Electronics and Communication Engineering - Networks Analysis and Synthesis

1.
In figure, the value of R should be
12 Ω
6 Ω
3 Ω
1.5 Ω
Answer: Option
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
7.07 Ω
10 Ω
14.14 Ω
20 Ω
Answer: Option
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 .
True
False
Answer: Option
Explanation:

The quadrants are different.


4.
The zinc can of a dry cell serves as positive terminal.
True
False
Answer: Option
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
0.25 mH
0.5 mH
0.707 mH
1 mH
Answer: Option
Explanation:

M = kL1L2