Standing waves and out of phase V&I

[koushikr_in]

Standing waves

V & I r in phase in a perfectly terminated tr line. but when the tx line is open or short circuited, standing waves r formed, and

V&I are out of phase. Why does this happen?

 

[frannk]

Re: Standing waves

at the short, you cannot have voltage but current is max. at the open, you cannot have current but voltage is max. therefore, out of phase.

 

[radiohead]

Re: Standing waves

It is impossible to define the phase of a current or voltage with magnitude zero, so the statement does not hold.