B) A wire of uniform circular cross-section is replaced in an electrical circuit. The new wire
has the same length and same resistance but half the diameter of the old wire.
What is the ratio (resistivity of the new wire / resistivity of the old wire)?
Meeting in "Ge
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Ответ:
Explanation: An atom consists of a small but massive nucleus that include protons (positive charge) and neutrons (neutral charge). around the nucleus is a cloud of rapidly moving electrons (negative charge)