The coil in figure carries current i=2.00 A in the direction indicated is parallel to an xz plane, has 3.00 turns and an area of `4.00xx10^(-3) m^(2),` and lies in a uniform magnetic field `overset-B=(2.00hati-3.00hatj-4.00hatk)mT.` What are (a) the orientation energy of the coil in the magnetic field and (b) the torque (in unit-vector notation) on the coil due to the magnetic field?

Answer

D

Explanation

Vertical component of earth's magnetic field.
`B_(V) = B_(H)tandelta`
`=(0.36 xx 10^(-4) xx tan60^(@)`
`=0.36 xx 10^(-4) xx sqrt(3) = 0.622 xx 10^(-4)` T
`=0.622 xx 10^(-4)Wb//m^(2)`