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Part 1Part IV
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Which way do the electrons move?With Steel Bar
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Which way does the current flow?QuantityLarge Coil VoltageLarge Coil TurnsSmall Coil VoltageSmall Coil TurnsEfficiency, f
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When you point the dot end to the left, which way is the beam deflected?UnitTurnsTurns
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When you point the dot end to the left, which way is the magnetic field?Value175
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When you point the dot end to the right, which way is the beam deflected?Uncertainty11
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When you point the dot end to the right, which way is the magnetic field?Without Steel Bar
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When you point the dot end up, which way is the beam deflected?QuantityLarge Coil VoltageLarge Coil TurnsSmall Coil VoltageSmall Coil TurnsEfficiency, f
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When you point the dot end up, which way is the magnetic field?UnitTurnsTurns
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When you point the dot end down, which way is the beam deflected?Value175
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When you point the dot end down, which way is the magnetic field?Uncertainty11
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Outside the magnet, the magnetic field flows from...
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Based on the previous answer, which end of the magnet is north?
Was your coil measured as perfect efficiency (f=1) with the steel bar, to within uncertainty?
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How did your measurement of f with the steel bar compare to without it?
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Part 2
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Which end of the magnet did you insert first?
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From above or below?
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What direction is the change in flux?
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Based on Lenz' law, what direction flux should the induced current generate?
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What direction induced current (as viewed from above) generates this flux?
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What direction did your galvanometer (initially) deflect?
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What direction is your coil wound, from red to black (as viewed from above)?
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What direction did you observe the induced current to flow (as viewed from above)?
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What direction is the magnetic flux this induced current would produce?
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Did your results match your expectation?
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When you inserted the magnet quickly, did the galvanometer deflect more or less?
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When you use more turns, does the galvanometer deflect more or less?
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When you leave the magnet inside, what direction does the galvanometer deflect?
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What is the name of the law which describes these last three observations?
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Part 3
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Which direction was the current flowing in the inserted coil (as viewed from above)?
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What direction does the field from that current point (inside the inserted coil)?
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What direction is the change in flux (in the coil at rest) when you insert the small coil?
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Based on Lenz' law, what direction flux should the induced current generate?
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What direction induced current (as viewed from above) generates this flux?
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What direction did your galvanometer (initially) deflect?
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What direction is your at-rest coil wound, from red to black (as viewed from above)?
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What direction did you observe the induced current to flow (as viewed from above)?
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What direction is the magnetic flux this induced current would produce?
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Did your results match your expectation?
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