alleryWhich statement describes insulators correctly?
AFew mobile charges
BMany free electrons
CMade only of copper
DAlways in liquid form
Answer & Solution
Correct answer: A. Few mobile charges
1. Insulators are non-conducting materials with few mobile charges.
2. They support only insignificant electric currents, so they are not excellent carriers.
3. They are not defined by copper or by being liquid.
_Source: Wikipedia, Electrical conductor, Lead section_
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