The dielectric material provides capacitive coupling of alternating currents from one conductor to the other while preventing {HEAD ~ coupling} of {TAIL ~ direct current} from one to the other 
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The dielectric material provides capacitive coupling of alternating currents from one conductor to the other while preventing { HEAD ~ coupling } of { TAIL ~ direct current } from one to the other
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH