n.
Opposition that a material or electrical circuit offers to the flow of electric current .
It is the property of a circuit that transforms electrical energy into heat energy as it opposes the flow of current. The resistance R , the electromotive force or voltage V , and the current I are related by Ohm's law . The resistance of an electrical conductor generally increases with increasing temperature and is utilized in devices such as lamps and heaters. The ohm ( 03A9; ) is the common unit of electrical resistance; one ohm is equal to one volt (see electromotive force ) per ampere.