You need to use a long solenoid to produce a magnetic field of magnitude (0.070 mathrm{~T}). If

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You need to use a long solenoid to produce a magnetic field of magnitude \(0.070 \mathrm{~T}\). If the maximum current you are able to run through the windings is \(20 \mathrm{~A}\), what is the minimum number of windings per meter the solenoid must have?

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