What impedance does a 1/2-wavelength transmission line present to an RF generator when the line is shorted at the far end?
Very high impedance
Very low impedance✓Bonne réponse
The same as the characteristic impedance of the line
The same as the output impedance of the RF generator
Explication
A lossless line an exact half wavelength long repeats whatever is connected to its far end, whatever its characteristic impedance. Repeating a short circuit means the generator sees an impedance close to zero.