Question

Bext

A square loop made of copper wire is falling (moving downward due to gravity) out of a region where there is a constant magnetic field of magnitude Bext = 0.235 T. The magnetic field is perpendicular to the plane of the loop, either into or out of the page (it doesn't matter which direction).

The loop is falling with a constant velocity because of the current induced in the loop and the magnetic field.

What is the velocity of the loop? Give your answer in m/s to at least three significant digits to avoid being counted wrong for rounding.

Information about the wire in the loop:

The copper wire has a mass per length: $LaTeX: \lambda =$ λ=λ= 3.45 $LaTeX: \times 10^{-2} \frac{kg}{m}$ ×10−2kgm×10−2kgm

The copper wire has a resistance per length: $LaTeX: \rho =$ ρ=ρ= 4.51 $LaTeX: \times 10^{-3} \frac{\Omega}{m}$ ×10−3Ωm×10−3Ωm

The length of the sides of the loop is not needed to solve this problem. However, do remember that a square has four sides.

Answer 1

2 2 v rm