If resistance rises, current flow decreases. If the voltage is increased proportional to the rise of resistance, the current will remain the same.
hiss - a fricative sound (especially as an expression of disapproval); the performers could not be heard over the hissing of the audience fizzle, hissing, hushing, sibilation noise - sound of any kind (especially unintelligible or dissonant sound); he enjoyed the street noises; they heard indistinct noises of people talking; during the firework display that ended the gala the noise reached 98 decibels
Along with the threatening sound comes an arched back, puffed hair, twitchy tail, flattened ears, and an open mouth, fangs ready to strike. Spitting can also occur with a hiss. When your cat takes on this serpent-like guise, back off, and do what you can to remove the perceived threat.