What is the Magnitude of the Magnetic Field in a Moving Loop?

[matt72lsu]

Homework Statement

A rectangular loop of wire is moving toward the bottom of the page with a speed of .042 m/s. The loop is leaving a region in which a magnetic field is directed into the page; the magnetic field outside this region is zero. If during the time of 1.5 s the magnitude of the change in magnetic flux is .0044 Wb, what is the magnitude of the magnetic field?

Homework Equations

E = delta flux / delta time ?

The Attempt at a Solution

I thought this was the equation to use mainly. but i have no idea where the veloicty comes into play. any help would be appreciated!

 

[Mindscrape]

Flux is B*A in this case, and you know d/dt (flux) = .0044. So you need to discover what part of the flux is changing: B, A, both?