A Rectangular Loop of Wire That Can Rotate About an Axis

Multiple Choice

A rectangular loop of wire that can rotate about an axis through its center is placed between the poles of a magnet in a $\vec { B }$ field of 0.40 T,as shown in the figure.The length of the loop L is 0.16 m and its width w is 0.040 m.What is the magnetic flux through the loop when the plane of the loop makes an angle of 60° with the $\vec { B }$ field?

A) 2.6 × 10^-3 T ∙ m²
B) 1.3 × 10^-3 T ∙ m²
C) 0 T ∙ m²
D) 2.2 × 10^-3 T ∙ m²
E) 0.80 T ∙ m²