An iron bar of length 1.4 m has a diameter of 2 cm and a uniform magnetization of 1.72 ? 10⁶ A/m directed along the bar's length. The bar is stationary in space and is suddenly demagnetized so that its magnetization disappears. What is the rotational angular velocity of the bar if its angular momentum is conserved? (Assume that Equation 29-27 holds where m is the mass of an electron and q = ?e.)

Transcribed Image Text:

II (classical) 2m 29-27