How much energy is stored in a room 3.0 m by 4.0 m by 2.4 m due to the earth's magnetic field with a strength of 5.0 × 10^-5 T? (μ₀ = 4π × 10^-7 T ∙ m/A)

Question

Quizplus · Accepted Answer

The energy stored in the room due to the earth's magnetic field can be calculated using the formula:

E = (1/2) μB^2V

Where μ is the magnetic permeability of the medium (air, in this case), B is the magnetic field strength, and V is the volume of the room.

Substituting the given values, we get:

E = (1/2) × (4π × 10^-7 T∙m/A) × (5.0 × 10^-5 T)^2 × (3.0 m × 4.0 m × 2.4 m)
E = 29 mJ

Therefore, the answer is B.

How Much Energy Is Stored in a Room 3