Question

A horizontal, straight wire carrying 12.0 A current from west to east is in the earth's magnetic field B. At this place, B is parallel to the surface of the earth, points to the north and its magnitude is 0.04 mT. Determine the magnetic force on 1 m length of the wire. If mass of this length of wire is 50 g, calculate the value of current in the wire so that its weight is balanced by the magnetic force.

29 Apr 2025
Answer :
Word Count : 249
We are given: * Current in the wire: $I = 12.0 \, \text{A}$ * Magnetic field: $B = 0.04 \, \text{mT} = 0.04 \times 10^{-3} \, \text{T}$ * Direction of current: West to East * Direction of magnetic field: North * Length of wire: $L = 1 \, \text{m}$ ________ ___ ________ ____ _____ ___ ____ _________ ____.
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