Electronics and Communication Engineering - Networks Analysis and Synthesis

46.
In figure, a voltmeter of internal resistance 1200 Ω is connected across 600 Ω resistance and it reads 5 V. The value of R is
1200 Ω
2400 Ω
3600 Ω
7200 Ω
Answer: Option
Explanation:


47.
For the wave shown in figure, the average and rms values are
50 A and 57.73 A
57.73 A and 50 A
25 A and 57.73 A
57.73 A and 70.7 A
Answer: Option
Explanation:

Area of triangle is half of rectangle. So average value = 0.5 x 100 = 50 A.


48.
A 10 ohm resistance and a 10 ohm capacitor are connected in series across a 100 V ac supply. The rms voltage across resistance is
1002V
100 V
none of the above
Answer: Option
Explanation:


49.
When a 10 K, 10%, 1/4 Ω resistor is connected in series with a 12 K, ± 1%, 1/4 Ω resistor, the resulting combination has the following specifications
22 K, ± 11%, 1/2 Ω
22 K, ± 5.5%, 1/2 Ω
22 K, ± 5.5%, 1/8 Ω
none of these
Answer: Option
Explanation:

Req = R1 + R2, maximum.


50.
The resonance frequency of the circuit is
5.4 Kn2
4.5 Kn2
5 Kn2
Answer: Option
Explanation:

Leq = 2 + 2 + 2 6 mH

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