What is RF in ac josephson effect?

The polarity of the solvent may affect the dye or the distance it will travel on a filter paper.

The higher the frequency of the current is, the further the travelling electrons are from the center of the conductor section. That's skin effect. In very high frenquencies, such an effect even...

There is little effect, other than the need for more refrigerant (freon) to fill the lines. You can put them as far away as you like.

IT IS RELATED TO AC ONLY BKZ SKIN EFFECT DEPENDS FREQUENCY ONLY WHERE IS IN DC NO FREQUENCY

Dc voltage applied to a semi conductor electron pair ,it passes through the tunnel made by insulator present in between two semiconductors with out any leakage.