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    Question

    Two long parallel wires 2 cm apart carry 5 A and 3 A

    currents in the same direction. What is the force per unit length on one wire?
    A 1.5 ├Ч 10тБ╗тБ┤ N/m Correct Answer Incorrect Answer
    B 2.25 ├Ч 10тБ╗тБ┤ N/m Correct Answer Incorrect Answer
    C 3 ├Ч 10тБ╗тБ┤ N/m Correct Answer Incorrect Answer
    D 4.5 ├Ч 10тБ╗тБ┤ N/m Correct Answer Incorrect Answer

    Solution

    Given:

    • Distance between wires: d = 2 cm = 0.02 m
    • Current in wire 1: IтВБ = 5 A
    • Current in wire 2: IтВВ = 3 A
    • Currents are in the same direction
    Formula for force per unit length between parallel wires: The force per unit length between two parallel current-carrying wires is:

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