P ( t ) =   I ( t ) V ( t ) =   I 2 ( t ) M ( q ( t ) ) {\displaystyle P(t)=\ I(t)V(t)=\ I^{2}(t)M(q(t))} As long as M(q(t)) varies little, such as under alternating current, the memristor will appear as a constant resistor.
P ( t ) =   I ( t ) V ( t ) =   I 2 ( t ) M ( q ( t ) ) {\displaystyle P(t)=\ I(t)V(t)=\ I^{2}(t)M(q(t))} Докле год M(q(t))) мало варира као што то чини под наизменичном струјом, помпорник ће изгледати као константни отпорник.