Find the size of the horizontal component

Reference no: EM13251391

Suppose that we align a compass needle with the horizontal component of the Earth's magnetic field and then switch on a second field 10mT in size in a direction we know to be at 90° to the Earth's field. We see the compass needle swing through 17°. What is the size of the horizontal component of the Earth's magnetic field?

Reference no: EM13251391

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