A horizontal desk surface measures 1.3 m by 1.0 m. If the Earth's magnetic field has a magnitude of 0.44 mT and is directed 65° below the horizontal, what is the magnetic flux through the desk surface? A) 1.1 × 10^-3 Wb B) 5.2 × 10^-4 Wb C) 3.2 × 10^-4 Wb D) 7.3 × 10^-3 Wb

Question

Quizplus · Accepted Answer

The magnetic flux (Φ) is calculated using Φ = B * A * cos(θ), where B is the magnetic field strength, A is the area, and θ is the angle between the field and the normal to the surface. Here, B = 0.44 mT = 0.44 × 10^-3 T, A = 1.3 m * 1.0 m = 1.3 m², and θ = 65°. Thus, Φ = 0.44 × 10^-3 T * 1.3 m² * cos(65°) ≈ 5.2 × 10^-4 Wb.

A Horizontal Desk Surface Measures 1