Question

How strong is the magnetic field inside a solenoid with 10,000 turns per meter that carries 20.0 A?

Final Answer

$0.251\textrm{ T}$

### Solution video

# OpenStax College Physics for AP® Courses, Chapter 22, Problem 64 (Problems & Exercises)

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Video Transcript

This is College Physics Answers with Shaun Dychko. We are going to find the magnetic field strength inside a solenoid that has 10000 turns per meter and a current of 20.0 amps. So the formula for that is permeability of free space multiplied by the turns per meter times the current. So that's 4

*π*times 10 to the minus 7 tesla meters per amp times 10000 turns per meter times 20.0 amps and that is 0.251 tesla.