Electronics and Communication Engineering - Networks Analysis and Synthesis

36.
A 20 Ω resistor, a 1H inductor and 1μF capacitor are connected in parallel the combination is driven by a unit step current. Under the steady state, source current flows through
inductor
capacitor
resistor
all
Answer: Option
Explanation:

Under steady state, C will be open, Inductor short circuit hence resistance will be shorted out, due to low reactance path current will now due to inductor only.


37.
A series resonant circuit has parameters 10 ω, 1 H and 0.1 F. It is excited by a voltage v = 100 sin ωt. At resonant frequency, the power dissipated in the circuit is
1000 W
707 W
500 W
414.14 W
Answer: Option
Explanation:


38.

Assertion (A): A tree of graph contains all the nodes of the graph.

Reason (R): The number of links is always less than the number of tree branches.

Both A and R are true and R is correct explanation of A
Both A and R are true and R is not the correct explanation of A
A is true but R is false
A is false but R is true
Answer: Option
Explanation:

The number of links has no relation to number of tree branches.


39.
Cells are connected in series to increase
current-rating
both voltage and current rating
the life of cell
voltage rating
Answer: Option
Explanation:

When cells are in series, current remains the same but voltage increases.


40.
The low pass filter characteristic shown in figure realizable.
True
False
Answer: Option
Explanation:

It is not realizable.