Round 5: Tossup 4

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

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