Pre-Lab QuestionsAnalyze Graph and rank the change in magnetic flux during Times A B C 4776- CoachOnCouch

PHYS 253 Physics Lab for Engineers

Question.4776 - Pre-Lab QuestionsAnalyze Graph 1 and rank the change in magnetic flux during Times A, B, C, D, and E from least to greatest. Use an equal sign to designate equal magnetic fluxes.Graph 1: A magnetic field over time.An MRI technician neglected to remove a metal bracelet from a patient. The bracelet is 7.0 cm in diameter. If the magnetic field is oriented from the patientâs foot to head, the area of the bracelet will be perpendicular to the magnetic field. During the scan, the magnetic field increases from 0 T to 1 T in 1.5 seconds. What is the magnitude of the induced emf in the bracelet? Show your work.A wire loop is being pulled out of a uniform magnetic field directed into the page at constant speed, v (Figure 5). Draw the direction of the force on the wire due to the magnetic field if the current in the loop is going in the clockwise direction.Figure 5: A wire loop (light blue frame) with a clockwise current (black arrows) pulled out of a uniform magnetic field (gray Xs). Current is represented by black arrows.Figure 6 shows a conductor moving in a uniform magnetic field. Show that when the conductor moves in the magnetic field, the magnetic force induces an electric field in the conductor by drawing what occurs inside of the conductor. Explain your drawing. Hint: Think about the magnetic force on the charges inside the conductor.Figure 6: A conductor (light blue rectangle) moving through a magnetic field (gray Xs).Experiment 1: faradayâs lawData SheetTable 1: Speed of Magnet vs. Current when Motion is Away from CoilSpeed of Motion of Magnet (qualitative)Maximum Current Reading ( µA)SlowMediumFastTable 2: Speed of Magnet vs. Current when Motion is Toward CoilPrediction:Speed of Motion of Magnet (qualitative)Maximum Current Reading ( µA)Slow Medium Fast Table 3: Number of Magnet vs. Current when Motion is Away from CoilPrediction:Number of MagnetsMaximum Current Reading ( µA)1 2 3 4Post-Lab QuestionsExplain the rationale you used to construct your predictions in Tables 2 and 3. Did your predictions match your results?Do your results support Faradayâs Law? Use your results to explain your answer.What do you predict will happen to the maximum current if you used the same magnet, moving at the same speed, but increased the radius of the loop? What do you predict will happen if you used the same magnet, moving at the same speed, but through a coil with less loops? Estimate the change in flux for one of your results in Table 1. Note: Resistance of a wire is equal to ÏL/ A and the resistivity of copper is 1.68 x 10-8 Î©m.Experiment 2: Building a Simple Electric MotorPost-Lab QuestionsWhat orientation of the coil (vertical or horizontal) allows current to flow through the assembly? What happens as you rotate the coil 180 º from this position? Explain your answer.Explain what would happen if both tails of the wire coil had all of the insulation scraped off.Analyze the motor design and list three variables in the experiment that if changed will increase or decrease the speed at which the coil rotates. Explain your reasoning.Given the strength of the battery and the size of the coil, there are an ideal number of coil turns that make a motor spin at high speeds without being unstable. Critique a motor design constructed with a coil of 50 coils of wire instead of 15 coils. Use your results to support your critique.

Answer Below:

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xxxxxxxxxxxx Building x Simple xxxxxxxx MotorPost-Lab xxxxxxxxxxxxx orientation xx the xxxx vertical xx horizontal xxxxxx current xx flow xxxxxxx the xxxxxxxx What xxxxxxx as xxx rotate xxx coil xxxx this xxxxxxxx Explain xxxx answer xxxxxxxx orientation xxxxxx with xxxxxxxxxx contact xxxxxxxx current xx flow xxxxxx generated xxxxx with xxxxxxxx disrupts xxxxxxx momentarily xxxxx current xxxxxxxx continuous xxxxxxxx without xxxxxxxx Explain xxxx would xxxxxx if xxxx tails xx the xxxx coil xxx all xx the xxxxxxxxxx scraped xxx Constant xxxxxxx in xxxx positions xx torque xxxxxxxx motor xxxxxx or xxxxx to xxxxxxxxxxx the xxxxx design xxx list xxxxx variables xx the xxxxxxxxxx that xx changed xxxx increase xx decrease xxx speed xx which xxx coil xxxxxxx Explain xxxx reasoning xxxx turns xxx more xxxxxxxxxx the xxxxxxxx torque xxx too xxxx increases xxxxxxxxxx while xx terms xx magnetic xxxxx strength xxxxxxxx B xxxxxxxxx torque x NIBAsin xxxxxx brush xxxxxxx reduces xxxxxxxxx losses xxxxxxxx motion xxxxx the xxxxxxxx of xxx battery xxx the xxxx of xxx coil xxxxx are xx ideal xxxxxx of xxxx turns xxxx make x motor xxxx at xxxx speeds xxxxxxx being xxxxxxxx Critique x motor xxxxxx constructed xxxx a xxxx of xxxxx of xxxx instead xx coils xxx your xxxxxxx to xxxxxxx your xxxxxxxx Considering xxxx there xx higher xxxxxx due xx more xxxxx while xxxx being xxxx resistance xxx to xxxx Joule xxxxxxx slower xxxxxxx instability xxx to xxxx imbalance xxxxxxxxx in xxxxxx efficient xxx unstable xxx if xxx power xxxxxx is xxxxxxx a xxxxxxx can xx achieved