- #1

- 461

- 16

## Homework Statement

Find the maximum torque on a square shaped wire provided N=120; l=4cm;R=10##\Omega##; B=0.2 T ; ##\omega=200 revs/sec##

## Homework Equations

##\tau=IaBsin(\theta)##

##\epsilon=\frac{d}{dt}\Phi##

## The Attempt at a Solution

##i=\frac{\epsilon}{R}=-\frac{\frac{d}{dt} (BAcos\omega t)}{R}##

##i_{max}=\frac{NBA\omega}{R}##

##\tau=il^2 B sin(\omega t)##

##\tau_{max}=il^2B = 2.6x10^-5 Nm##

This solution depends on the fact that my area vector is initially parallel to the magnetic field.