A quantum mechanical effect decreases the strength of these devices when their constituent materials have a low density of states. AC coupling uses these devices as high-pass filters, blocking direct current. In [emphasize] (-5[1])series, the strength of these (-5[1])devices equals the (10[1])reciprocal of (10[1])a (10[2])sum of (10[1]-5[1])reciprocals. Resistance (10[1])times a characteristic quantity of these (10[1])devices equals the time (10[1])constant. An inductor and one of these devices make an oscillating circuit. A (10[1])quantity named for these devices, which equals charge over voltage, can be increased by (10[2])inserting a dielectric between two parallel plates. For 10 points, what circuit elements that store energy in electric fields name a quantity measured in farads? (10[1])■END■