Electronics and Communication Engineering - Networks Analysis and Synthesis

26.
C = (2) (energy)/V2
True
False
Answer: Option
Explanation:


27.
A 3 phase balanced supply feeds 3 phase unbalanced load. Power supplied to the load can be measured by using
  1. 2 wattmeter
  2. one wattmeter
  3. 3 wattmeter
Which of the above statements is correct?
1 and 2
1 and 3
2 and 3
3 alone
Answer: Option
Explanation:

A minimum of 2 wattmeters is required to measure 3 phase power. Of course power can be measured by putting one wattmeter in each phase.


28.
Which of the following is correct for a driving point functions?
The real parts of all poles must be negative
The real parts of all poles and zeros must be negative
The real parts of all poles and zeros must be negative or zero
The real parts of all zeros must be negative
Answer: Option
Explanation:

It is a necessary condition for response to be stable.


29.
An infinite ladder is constructed with 1 Ω and 2 Ω resistors shown below.
8.18 A
0 A
9 A
can't determined
Answer: Option
Explanation:

R = 1 + (2 || R)

R = 2

.


30.
In the circuit of figure the voltage across capacitor when switch is closed at t = ∞ is
0 V
20 V
very large
7.5 V
Answer: Option
Explanation:

Voltage across capacitor = voltage across 3Ω resistance =