Question

The LLTL is initially uncharged. Let T be the time it takes for the signal to travel the line length L - 300 meters. The line has characteristic impedance of 50 Ω and a phase velocity u-3(10)" meters/second. Find: (a) the value of the voltage on the line just after the switch closes; give proof. (b) the value of the voltage at z L/3 meters at time t-2T. closes at tre s-Switch

Answer 1

L=300 m Signal EoA-vte。 Ra to reath the lond which İS 30m aun4 fvom the genevator. So at t-o· there 'ts no Itod effect until time .. The equivalent circuit at t 50-+50 米 Voltage on the line Jast after the Switch is l Vo=FV closes ⑥ Reflection coefficient at generator G- 20 tgtzo Reflection coefficient at tad =瓦-Zo-150-50 瓦+20 150+50

3XlD Yeacb genevatoataTSec. Agio at genexator laca. 5)二0V Yeflects bcK to land and process. continues until total enevgg dissipates by g4 。 at time t aT