You find the current required to cancel the Earth\'s magnetic field is I0 = 0.99

Question

You find the current required to cancel the Earth's magnetic field is I0 = 0.99 A. You find to deflect the beam into one of the pins requires a current of I = 3.91 A . What is the magnitude of the magnetic field? Use SI units, but do not include units in your answer. You find the current required to cancel the Earth's magnetic field is I0 = 0.99 A. You find to deflect the beam into one of the pins requires a current of I = 3.91 A . What is the magnitude of the magnetic field? Use SI units, but do not include units in your answer.

Explanation / Answer

Earth's magnetic field

Bearth=5*10-5 T

Magnetic field B is directly proportional to current .therefore

B/Bearth=I/Io

B=(5*10-5)*(3.91/0.99)

B=1.975*10-4T

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