Calculating Energy Crossing Area in Uniform Fields

AI Thread Summary
The discussion centers on calculating the energy crossing a square area in a uniform magnetic and electric field. Given a magnetic field of 4.49 × 10−5 T and an electric field of 10.2 V/m, the permeability of free space is noted as 4 pi ×10−7 N·m². The initial calculations for current (I) yield 364.449 A, leading to a power (P) of approximately 2.37 W. However, there is uncertainty regarding the area of the square, which is 0.65 cm on each side, prompting a reevaluation of the calculations. The need for accurate area measurement is emphasized to ensure correct power output results.
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Homework Statement



In a certain region of space, there is a uniform magnetic field B = 4.49 × 10−5 T, parallel to the x-axis, and a uniform electric field E = 10.2 V/m, parallel to the y-axis.
The permeability of free space is 4 pi ×10−7 N · m2.
At what rate does energy cross a square area, 0.65 cm on a side, that is perpendicular
to the z-axis?
Answer in units of W.

Homework Equations



I = EB / permeability

P = IA

The Attempt at a Solution



I = (10.2 V/m)(4.49 e-5)/ (4*pi*e-7)
=364.449 A

P=(364.449 A) (0.0065 m)
=2.36892 W

This answer is not right when I plug it into my online homework answers. :(
 
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