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Because nanotubes are good conductors , the resulting images also are able to conduct electricity . Most metals , such as copper and aluminum , make good conductors of electricity . Even 70 years later in the 1980s , however , superconductivity had only been observed in metals and alloys that are good conductors of electricity , with the highest transition temperature recorded remaining at a very low level of 23 K ( -250 oC ) . As lightning repeatedly seeks out sites that are good conductors and elevated above ground level , so do earthquakes return to the same areas time after time . lightning rod - lightning rod lightning rod , a rod made of materials , especially metals , that are good conductors ... Metals are good conductors of heat . Capacitors and inductors only become good conductors under certain conditions . I 'm not sure of what goes on in magnets which are also conductors - that bit was always glossed over a bit in solid state .