How Much Energy Is Stored in a Room 3

question 55

Multiple Choice

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)

• A) 570 mJ.
• B) 29 mJ.
• C) 10 mJ.
• D) 100 mJ.
• E) 570.0 mJ.

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