Electronics and Communication Engineering - Networks Analysis and Synthesis

1.
In the circuit of figure
Va would always lag Vb
Va would always lead Vb
Va and Vb can be in phase
phase angle between Va and Vb would always be 90°
Answer: Option
Explanation:

Voltage across inductance leads the current and voltage across capacitance lags the current.


2.
As per BIS, solid insulators are classified into 6 categories.
True
False
Answer: Option
Explanation:

The number of categories is seven.


3.
Dielectric constant of air is about 5.
True
False
Answer: Option
Explanation:

r for air is 1.


4.
Consider the following units
  1. sec-1
  2. rad2/sec2
  3. sec
  4. Ω
The units of , RC and are respectively
1, 2, 4, 3
3, 2, 1, 4
2, 4, 1, 3
1, 2, 3, 4
Answer: Option
Explanation:

has units of seconds. Therefore, has units of sec-1. has units of rad/sec.

Therefore has units of rad2/sec2, RC is a time constant and has units of sec. has units of ohms.


5.
In a conductor, voltage v, conductance G and charges q are related as
v = Gq
q = vG
Answer: Option
Explanation: