Question

A straight 2.20 m wire carries a typical household current of 1.50 A (in one direction) at a location where the earth's magnetic field is 0.550 gauss from south to north.. . Find the magnitude of the force that our planet's magnetic field exerts on this cord if is oriented so that the current in it is running from west to east.

Answer 1

Use F = I*B*L*sinθ 

I is the current, B is the magnitude of the magnetic field (Note: 1 gauss is equal to 1E-4 Tesla, the SI unit), and L is the length of wire. Adjust θ for each separate orientation.

All you need to do is just plug the given values to the equation. You should receive the same answer for parts a and b.

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