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Why is the metal inside a household cable covered in plastic?
APlastic is a conductor
BPlastic is a resistor
CPlastic is a magnet
DPlastic is an insulator
Answer & Solution
Correct answer: D. Plastic is an insulator
1. A conductor lets electric charge move through it, and metal does this well.
2. An insulator does not let electric charge move through it.
3. Plastic is an insulator, so it keeps the current inside the metal.
4. That is what makes the cable safe to hold.
_Source: Siyavula Natural Sciences Grade 8 (CC BY 4.0), Resistors_
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