SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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pencil lead (graphite)
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plastic cord
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copper wire
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wool yarn
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Detailed explanation-1: -Silver is the best conductor of electricity but copper is used instead of silver for making wires.
Detailed explanation-2: -Metals like copper, iron, gold, aluminum, and silver are the best materials for conducting electricity.
Detailed explanation-3: -To get an electrical current to flow through metals, the power source has to fight against resistivity. The lower the level of resistivity, the more electrical conductivity a metal has. And since copper wire has a low level of resistivity, it’s a fantastic electrical conductor.
Detailed explanation-4: -In copper, there is enough heat energy at ordinary room temperatures to liberate a vast number of the weakly held valence electrons. The presence of a large number of free electrons in copper, as in other metals, is what makes it a good conductor of electricity.