A straight stream of protons passes a given point in space at a rate of 2.5 x 109 protons/s. What magnetic field do they produce 1.5 m from the beam

B = 5.3x10⁻¹⁷ T

Explanation:

The magnetic field can be calculated as follows:

Where:

μ₀: is the magnetic permeability = 4πₓ10⁻⁷ H/m

I: is the current          

R: is the distance between the magnetic field and the beam = 1.5 m

The current is:

Hence, the magnetic field is:            

Therefore, the magnetic field is 5.3x10⁻¹⁷ T.

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