A copper wire of diameter 2.0 mm and length 8.0 cm is positioned horizontally in a…
PHYSICS · Subjective · AP · Physics 2: Algebra-based · Magnetism and Electromagnetism · Magnetism and Electromagnetism
Problem
A copper wire of diameter 2.0 mm and length 8.0 cm is positioned horizontally in a uniform magnetic field of strength 0.2 T perpendicular to the wire. The density of copper is 8900kg m−3. Calculate the current that needs to flow through the wire so that it is suspended in mid-air. (g=9.8N kg−1)