Question

What is approximately how many times greater is the resistivity of insulators compared to metals?

Options

• About 10¹⁸ times or even more

• About 10−8 times

• About the same

• About 10 times

Answer 1

Insulators have resistivity that may be about 10¹⁸ times greater than that of metals or even more. This enormous difference in resistivity explains why insulators effectively prevent current flow while metals allow current to pass easily.