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March 28, 2017

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A thin 2.82 m long copper rod in a uniform
magnetic field has a mass of 44.2 g. When the
rod carries a current of 0.238 A, it floats in
the magnetic field.
The acceleration of gravity is 9.81 m/s2 .
What is the field strength of the magnetic
field?
Answer in units of T.

  • physics - ,

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