What does it mean when the current passing through a resistor is zero and the potential difference across the resistor is 5.8..
Stacey Warren - Expert brainly.com
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if you put a simple AA (usually 1.5V) battery between your finger and thumb, I doubt much will happen. you have created a 1.5V potential difference between your finger and thumb but your body's resistance is such that no current will flow.
current is literally the flow of electrons within the conductor. the Amp is 6.2 (followed by 18 zeroes) worth of electrons, or one "coulomb", passing by per second. it's actually quite slow.
voltage and potential difference are ways of describing the "desire" of electrons, in a battery, to flow from one terminal to the other.
the same can be said of an apple that is hanging on the top branch of a tall apple tree. at some point, it's weight or the wind or whatever will cause it to come crashing to earth releasing its energy potential. gravity drags it downwards. until that point, it's energy is potential - latent and to be released.
finally, in the example you give, i guess that you may have applied a potential difference between a resistor that is really a insulator. ie that will not allow electrons to move.
alternatively, Ohms law - that a current always flows from a voltage or potential difference - is an empirical observation. we are taught that V = IR, is that a voltage produces a directly proportional current and that resistance is a given. as far as i know, that is an approximation.