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Working with a Current Carrying Wire in Magnetic Field

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A long straight wire having a mass of 0.025 kg/m is suspended by threads. When the wire carries a 20-A current, it experiences a horizontal magnetic force that deflects it to an equilibrium angle of 10 degrees. What are the magnitude and direction of the magnetic field? (Assume that field vectors are perpendicular to the wire)

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Force/unit length due to gravity is mg/L where L is the length. When it is in equilibrium at an angle t, there is a ...

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