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A line with lumped parameters of 10 T sections series resistances of 10 ohms per section and 200 ohms shunt resistance is matched to a generator with emf of 3 volts and terminated by its characteristic impedance. The characteristic impedance is given by—
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- 45 Ω
- 22.4 Ω
- 90 Ω
- 180 Ω
Correct Option: A
Characteristic impedance of line of T section may be calculated from the image impedance and it is given by
| ZC = | √ | Z1 + Z2 | ||
| 4 |
so we get ZC = 45 Ω and its value remains same for any number of symmetric sections.
