Question

Consider the following figure, a uniform magnetic field of 0.2 T is directed along the positive x-axis. What is the magnetic flux through top surface of the figure

• A. Zero
• B. 0.8 m-wb
• C. 1.0 m-wb
• D. – 1.8 m-wb

Answer 1

Answer: (C)

1.0 m-wb

Answer 2

Magnetic flux φ = BA cosθ for the top surface, the angle between normal to the surface and the x-axis is $\theta = 60 ^ { \circ }$

∴ φ = 0.2 × (10 × 10 × 10^–4) × cos 60^o = 10^–3 wb = 1m-wb