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## Homework Statement

A single rectangular loop of wire with width w = 30.7 cm and length L = 79.7 cm is situated so that part is inside a region of uniform magnetic field of 0.407 T and part is outside the field. The total resistance of the loop is 0.244 Ω. Calculate the force F required to pull the loop from the field (to the right) at a constant velocity of 3.56 m/s. Neglect gravity.

HELP: What current is induced when the loop is pulled from the field? What is the magnetic force on the current-carrying wire of the loop?

https://wug-s.physics.uiuc.edu/cgi/courses/shell/common/showme.pl?cc/Knox/phys130a/spring/homework/15/02/HW16_5.jpg [Broken]

## Homework Equations

emf= -N([tex]\Delta[/tex]BA/[tex]\Delta[/tex]t)

I= emf/R

F= NILB

## The Attempt at a Solution

I found the emf to be ..448 (-1(0-(.407x.3985x.309))/.1119=.448)

From there I found the current to be 1.836 A and using that I found the Force to be .298

(1.836x.3985x.407=.298)

This is incorrect and I'm not quite sure what I'm doing wrong. The use of the velocity throws me off and I have a feeling my mistake is coming from there.

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