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
Take precautions against redirected aggression. It's possible that your cat is hissing at you because he feels threatened by a neighborhood cat or dog that has challenged your cat through the window or screen door. If you believe this to be the case, try keeping the curtains and door closed as much as possible.