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The product of the force on an object and the displacement the object undergoes along the direction of the force.
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Positive work by a magnetic field
Therefore, in this case the magnetic field does positive work.
How is this contradiction possible? … Magnetic field, which did no work on a single charge, now does positive work when the current carrying elements clumped together in a conductor. …
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Why isn't work relative?
o work is defined as $$W=\int_{x_1}^{x_2}\vec{F}.\vec{ds}$$ or
$$W=\int_{t_1}^{t_2}\vec{F}. … So why isn't work relative? …