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 (-5[1])filters, (10[3])blocking (10[1])direct current. (-5[4])In (10[2]-5[1])[emphasize] (10[2]-5[2])series, the strength of (-5[1])these (-5[2])devices equals the (10[8]-5[2])reciprocal of (10[1])a (10[9])sum (10[2]-5[2])of (10[10]-5[17])reciprocals. (10[2]-5[5])Resistance (10[1]-5[1])times a (-5[2])characteristic (10[2])quantity of these (10[2])devices (10[2])equals the time (10[9]-5[1])constant. (10[2])An (10[1])inductor and (10[1])one (10[1])of these (10[2])devices make (10[3])an (10[1])oscillating (10[3])circuit. A (10[1])quantity named (10[1])for these (10[1])devices, which equals (10[1])charge over voltage, can be (10[1])increased by (10[2])inserting a (10[1])dielectric between two (10[1])parallel (10[7])plates. For 10 (10[1])points, what circuit (10[2])elements (10[2])that store energy in (10[1])electric (10[1])fields name a (-5[1])quantity measured in (10[3])farads? (10[17]0[5])■END■