A light horizontal conducting wire is placed in a uniform vertical magnetic field

PHYSICS · Subjective · AP · Physics 2: Algebra-based · Magnetism and Electromagnetism · Magnetism and Electromagnetism

Problem

A light horizontal conducting wire is placed in a uniform vertical magnetic field. Its mass per unit length is

0.05\,\text{kg m}^{-1}

. Explain, in one or two sentences, what must be done to the current in the wire so that it begins to lift upward against gravity.