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# Physics Problem

A wire of mass $$100 g$$ is carrying a current of $$2 A$$ towards increasing $$x$$ in the form of $$y=x^2 (-2m \leq x \leq +2m)$$. This wire is placed in a magnetic field $$\vec{B} = -0.02 \hat{k}$$ tesla. The acceleration of the wire (in $$m/s^2$$) is

$$(a)$$ $$-1.6 \hat{j}$$

$$(b)$$ $$-3.2 \hat{j}$$

$$(c)$$ $$1.6 \hat{j}$$

$$(d)$$ $$0$$

3 years, 8 months ago

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got it!!! · 3 years, 8 months ago

C. The magnetic field is uniform and cross product is distributive. Thus, the wire is equivalent to a 4 m wire carrying a 2 A current to the right. · 3 years, 8 months ago