Question

A circle in the xy-plane has diameter 9.8 cm. A magnetic field of strength 3.4 T is oriented at an angle of 23° to the z-axis, a line that is perpendicular to the xy-plane. What is the magnetic flux through the circle?

0.26 Wb
0.98 Wb
0.024 Wb
0.47 Wb

Answer 1

Let the area vector point along the z-axis:
Flux = B.A = B*cos(23)*pi*r^2