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April 18, 2014

Homework Help: physics

Posted by Rachel on Tuesday, April 5, 2011 at 10:01pm.

A Hall-effect probe operates with a 120 -mA current. When the probe is placed in a uniform magnetic field of magnitude 0.0840 T, it produces a Hall voltage of 0.660 V.

When it is used to measure an unknown magnetic field, the Hall voltage is 0.360 V. What is the magnitude of the unknown field?

thank you helper

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