How Do You Calculate the Magnetic Field Around a Wire?

AI Thread Summary
To calculate the magnetic field around a long straight wire carrying a current, the relevant formula is B = (μ₀ * I) / (2 * π * r), where B is the magnetic field, μ₀ is the permeability of free space, I is the current, and r is the distance from the wire. For a current of 2.5 A and a distance of 25 cm (0.025 m), the magnetic field can be determined using this equation. The discussion emphasizes the importance of identifying the correct formula for calculating magnetic fields in this context. Understanding the relationship between current, distance, and magnetic field strength is crucial for solving such problems. This approach provides a clear method for calculating the magnetic field around a wire.
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Hi there, i am facing a question that seem quite simple, i just do not know what formula to use.

the questions is:

A long straight wire carries a current of 2.5 A. Find the magnitude of the magnetic field 25 cm from the wire.

I = 2.5 A
0.025 m
 
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Hi. That's on the same vein as the one I asked a few threads ago. Find the equation that shows the magnitude B or a magnetic field at a distance r (clue: it's the one with the permeability of free space constant in). Hope that helps
 

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