Chapter 23 - Magnetic Flux and Faraday's Law of Induction - Problems and Conceptual Exercises - Page 831: 41

(a) $0.86A$ (b) $4.1\frac{m}{s}$

(a) We know that $I=\sqrt{\frac{P}{R}}$ We plug in the known values to obtain: $I=\sqrt{\frac{8.9}{12}}$ $I=0.86A$ (b) As $v=\frac{IR}{BL}$ We plug in the known values to obtain: $v=\frac{(0.86)(12)}{(2.0)(1.25)}$ $v=4.1\frac{m}{s}$