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.
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 * _______ _____ ___ ___ ____ ______ ___ ______ ________ _____.
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यदि अचर सदिश हो तो सिद्ध करें कि
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