Question $1$

$5$ pts

A horizontal wire with a mass per unit length of $0\mathrm{.}2k\frac{g}{m}$ carries a current of $4$ A in the $+x$ direction. If the wires is placed in a uniform magnetic flux density $B,$ what should the direction and minimum magnitude of $B$ be in order to magnetically lift the wire vertically upward? $[$Hint: The acceleration due to gravity is $g=-$hat$(z)9\mathrm{.}8\frac{m}{s^2}1$

hat$(y)0\mathrm{.}24T$

$-90\mathrm{.}49T$

$0\mathrm{.}24$ T

$y0\mathrm{.}49T$