Emf in a conducting rod moving away from a wire with current I

AI Thread Summary
The discussion revolves around calculating the electromotive force (emf) generated in a conducting rod moving perpendicularly away from a long, straight wire carrying a current. The key question is how to determine the emf when the rod is at a distance r from the wire. Participants express confusion and frustration, indicating a lack of resources and understanding of the relevant equations. There is a clear need for guidance on the principles of electromagnetic induction in this context. Overall, the thread highlights the challenges faced by individuals in grasping the concepts of emf in relation to moving conductors near current-carrying wires.
Mauvai
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Homework Statement


A conducting rod of length l moves with a constant speed v perpendicular
to an infinately long, straight wire carrying a current I. What is the emf generated between the ends of the rod when it is a perpendicular distance r from the wire?


Homework Equations


no idea whatsoever


The Attempt at a Solution


sorry completely lost on this one :-/
 
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And i realize this looks like i haven't tried, but I've checked every set of notes, every piece of background reading provided, posted on my years facebook page, googled it, and absolutely nothing has come up.
 
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
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