engineering recuitment BHEL Engineer Trainee Mock Test 2025 Electromagnetic Theory Transmission Lines Input Impedance
A loss-less transmission line of length l is open-circuited and has characteristic impedance Z0. The input impedance is
1
+ j Z0 tan βl
2
- j Z0 tan βl
3
- j Z0 cot βl
4
+ j Z0 cot βl