Experiment 5 Mark Sawh

Experiment 5 Mark Sawh - Experiment 5 Part 1 The Earths...

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Experiment 5 Part 1 – The Earth’s Magnetic Field Part 2 – Magnetic Field of a Solenoid Mark Sawh Date Preformed – 09-29-09 Date Due – 10-06-09
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Part 1 – The Earth’s Magnetic Field Purpose To obtain the horizontal component of the earth’s magnetic field by measuring the period of oscillation of a bar magnet in a known field. Theory The horizontal component of the earth’s magnetic field can be obtained by studying how it affects a bar magnet which is suspended so that that it is few to rotate in a horizontal plane. Such a magnet will line up in the direction of the horizontal component of the earth’s fields. What causes this is a field of magnitude B which produces a torque τ on the bar magnet: o τ = - mBsin Θ o The minus sign means that it is a restoring torque, m is the magnitude of the magnetic moment of the bar magnet, and Θis the angle between the magnetic moment and the magnetic field vector. o If the angle Θ is small, then sin Θ≈ 0 , and the equation reduces to: τ = - mB Θ If we set the bar magnet into oscillation, the motion of the bar magnet is
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This note was uploaded on 09/03/2011 for the course PHY 2049L taught by Professor Chen during the Spring '11 term at FAU.

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Experiment 5 Mark Sawh - Experiment 5 Part 1 The Earths...

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