Electronics and Communication Engineering - Networks Analysis and Synthesis

21.
For the two port of figure, z22 is
26/7 Ω
6/7 Ω
2/3 Ω
1 Ω
Answer: Option
Explanation:


22.
The internal impedance of a source is 3 + j 4 Ω. It is desired to supply maximum power to a resistive load. The load resistance should be
3 Ω
4 Ω
7 Ω
5 Ω
Answer: Option
Explanation:

RL = 32 + 42.


23.
In figure readings of the two voltmeters should be
100 V on each meter
200 V on each meter
150 V on V1 and 50 V on V2
50 V on V1 and 150 V on V2
Answer: Option
Explanation:

Both voltmeter connected in parallel, hence read same voltage as applied.


24.
The internal impedance of a source is 3 + j 7 Ω. For maximum power transfer, load impedance should be
3 + j 7 Ω
3 - j 7 Ω
7 + j 3 Ω
7 - j 3 Ω
Answer: Option
Explanation:

Load impedance should be conjugate of source impedance.


25.
In the circuit of figure, the current through battery E3 is
4 A charging
4 A discharging
4 A charging or discharging depending on value of E3
4 A charging or discharging depending on values of E1, E2, E3
Answer: Option
Explanation:

4 A current is flowing into the battery. Therefore, it is charging current.