A material has conductivity greater than rubber but much less than copper. Which material is it most likely? A) Glass B) Silicon C) PVC D) Wood

What the conductivity clue is telling you

The question describes a material that conducts electricity better than an insulator (rubber) but far worse than a metal conductor (copper). That “in-between” behavior is the defining idea of a semiconductor.

Classifying the options by electrical behavior

• Copper (not an option, but given as a reference) is a good conductor with very high conductivity.
• Rubber (given as a reference) is an insulator with extremely low conductivity.
• Silicon is a semiconductor, meaning its conductivity is intermediate and can change with temperature, light, or doping.
• Glass, PVC, and wood are generally insulators (wood can conduct a bit when wet, but it is not classified as a semiconductor).

Picking the best match

Since only silicon fits the “between insulator and conductor” category, the best answer is B) Silicon.