The correct statement regarding electric insulators is:
Charges within electric insulators do not readily move.
Electric insulators are materials that do not allow electric charges to move freely, which is why they do not conduct electricity well. The other statements are incorrect:
- Electric charges do not move freely in electric insulators.
- While some insulators may have high tensile strength, this is not universally true for all insulators.
- Electric insulators are typically poor heat conductors, not good heat conductors.