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The correct answer among the choices given is the last option. Cora wrapping the copper wire with a thick plastic coating keeps a current from passing out a wire. The plastic wire here serves as an insulator. An insulator is a material that prevents electricity or current to flow out the circuit. In order to lessen the loss of energy.
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Insulators are often defined as materials that do not allow electricity to flow through them. She wants to stop the flow of current out from the wire.
What is an insulator?
Insulators are commonly employed in physics. Insulators are often defined as materials that do not allow electricity to flow through them.
Insulators are also referred to as poor electrical conductors. We may discover various instances of these insulators in our daily lives. Insulators include materials such as paper, glass, rubber, and plastic.
From the following observation, we come to the result that she wants to make a insulator.
Hence the option d is correct .
To learn more about the insulator refer to the link;
https://brainly.com/question/24909989