Configuring op-amp to supply constant current

[Collisionman]

Homework Statement

How could an op-amp with feedback be configured so that it would supply a constant current to some load, even if the resistance of the load changed?

Homework Equations

None. Just a general question.

The Attempt at a Solution

I don't really know how to approach this as I don't have a huge amount of knowledge of electronics.

 

[gneill]

If you want something held constant it usually needs to participate in the feedback path in some way...