Electronics and Communication Engineering - Networks Analysis and Synthesis

11.
An RLC series circuit is fed form 100 V ac supply. Inductance is 1 H and Q = 7.5. At resonance, the voltage across inductance is
750 V
100 V
about 13.5 V
1500 V
Answer: Option
Explanation:

Voltage across inductance at resonance = QV = 7.5 X 100 V.


12.
For an RLC series circuit, Z(s) will be of the form of
Answer: Option
Explanation:

which is similar to


13.
In the circuit shown in the figure, steady-state was reached when the switch S was open. The switch was closed at t = 0. The initial value of the current through the capacitor 2 C is
zero
1 A
2 A
3 A
Answer: Option
Explanation:

At steady state capacitor will be open and inductor will short circuited.

V across 2C will be = 12v

.


14.
As temperature increases, the temperature coefficient of a metal
decreases
increases
remains unchanged
any of the above
Answer: Option
Explanation:

It at is temperature coefficient at t°C and a0 is temperature coefficient at 0°C. .


15.
A wire has a resistance R ohm. If another wire of the same material and same weight has double the diameter (as compared to the first wire), the resistance of the second wire will be
0.5 R
0.25 R
0.125 R
R/16
Answer: Option
Explanation:

Since diameter is double, area of cross-section is four times and length is one-fourth.

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