Question

which of the following describes an electric insulator?
a. a material that has a low resistance and prevents charges from moving freely
b. a material that has a low resistance and allows charges to move freely
c. a material that has a high resistance and allows charges to move freely
d. a material that has a high resistance and prevents charges from moving freely

Explanation:

An electric insulator is a material that resists the flow of electric current. Resistance is a measure of how much a material opposes the movement of electric charges. A high - resistance material makes it difficult for charges to move freely.

Answer:

D. A material that has a high resistance and prevents charges from moving freely