a)$)$ A straight 1.0−$1\mathrm{.}0-$m wire connects the terminals of a motorcycle battery to a taillight. The motorcycle is parked so that the wire is perpendicular to Earths magnetic field. The wire experiences a force of magnitude 0.0004$\mathrm{}\mathrm{}\mathrm{}$ N when there is a current of 1.5 A.$.\; Calculate\; the\; magnitude\; of\; Earths\; magnetic\; field\; at\; that\; location.$

b)$)$ What is the magnitude of the force on a straight 1.2m wire with a current of 3.0A and inclined at an angle of 45 degree to a 0.40 T uniform magnetic field?

 

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