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the relationship between the deflection of the wire and the ccurrent is when the voltage is 12volt the current become higher.

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Presumably you are referring to the force on a conductor placed in a magnetic field? In which case, it is equal to the Flux Density of the field (in teslas), the length of the conductor within the field (in metres), and the value of the current passing through the conductor (in amperes).

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Q: What is the relationship between the deflection of the wire and the current?
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