The meringue acts as a nonconductor, and prevents the heat from melting the ice cream.
2.
Its walls and floor-arches were of porous terra cotta, a nonconductor of heat, cold or noise.
3.
For a fraction of a second, the experiment converted liquid molecular hydrogen _ normally, a nonconductor of electricity _ into an excellent conductor, presumably a metal.
4.
A PV cell consists of a nonconductor _ often a silicon wafer similar to those used for computer chips _ coated on one side with exotic metal atoms that produce a surplus of electrons when exposed to sunlight.
परिभाषा
a material such as glass or porcelain with negligible electrical or thermal conductivity पर्याय: insulator, dielectric,
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