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A butterfly is perched on a horizontal length of current-carrying wire. The wire is oriented at...

A butterfly is perched on a horizontal length of current-carrying wire. The wire is oriented at right angles to a uniform magnetic field that is just strong enough to support the weight of the butterfly and the wire. The butterfly has a mass of 1.5 g and the wire has a mass of 5 g and a length of 10 cm. If the magnitude of the current is 1.6 A directed to the left, what is the magnitude of the magnetic field and which way does it point?

0.16T, outwards
0.16T, inwards
0.25T, outwards
0.40T, inwards
0.40T, outwards
None of these
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