2006-12-03 19:48:16 · 8 answers · asked by Wafeeq 1 in Science & Mathematics ➔ Engineering
Best conductor in theory is a super-conductor, or zero resistance conducting material.
Best PRACTICAL metal conductor in terms of cost and availability is copper.
Second best PRACTICAL metal conductor in terms of cost and availability is aluminum.
Copper, gold, and silver all conduct about in the same manner. All are about equal, electrically. However, gold will never tarnish or corode. Gold can also be drawn out in VERY thin strands. All microchips, or at least the older ones, have gold inside. Silver is about the same, but still too expensive for a practical standpoint.
Rubber or polymers are good insulators, but now gases and compounds are better. Porcelain, or ceramic, is still good, but the cost of production and weight is putting it to the wayside. Lighter polymers and plastics are replacing polcelain insulators.
Sulfur Hexaflouride gas is a VERY good insulator, used now in high voltage, high power circuit breakers and switches. Under pressure, the SF6 gas can extinguish an arc almost instantaneously with only a small gap between the opening conductors.
2006-12-03 23:20:16 · answer #1 · answered by JoeSalsa 2 · 0⤊ 0⤋
22) B) it really is a foul conductor in case you experience it cooler at room temperature, it ability it conducts warmth properly, so no longer a reliable insulator. 40 5) D) An asphalt highway darkish merchandise absorbs properly than a great merchandise which reflects a lot waves. sparkling glass window and air enable the techniques to bypass by, reflect and snow reflects fairly some the waves. 40 seven) D) An asphalt highway reliable absorbers are the reliable emitters 40 4) A) the cloth of enlargement substance is made B) Its section C) Its substitute in temperature purely the temperature determines the enlargement no longer warmth transmission mode.
2016-11-30 03:02:03 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Silver is by far the best conductor and China Clay (Porcelain) is by far the best insulator.
2006-12-04 02:00:06 · answer #3 · answered by raghunandan r 1 · 0⤊ 1⤋
best conductor silver best insulator rubber
2006-12-03 20:49:27 · answer #4 · answered by sriramna 1 · 0⤊ 0⤋
Working at RF with high voltages, currents and needing low loss. Silver plating is used for it's low resistance. Ceramics and Teflon are used for their high resistance, and low dissipation.
2006-12-04 15:59:07 · answer #5 · answered by charley128 5 · 0⤊ 0⤋
best conductor is copper and best insulator is porceline...
2006-12-03 20:19:54 · answer #6 · answered by uma 2 · 0⤊ 1⤋
gold and ceramics
2006-12-03 19:49:58 · answer #7 · answered by alexrombuc 2 · 1⤊ 0⤋
the one that kills you...
2006-12-03 19:50:42 · answer #8 · answered by antsam999 4 · 0⤊ 1⤋