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PHYSICS 202Lab Report 8-GRADED A

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1. Objective The objective of this lab is to examine the induced voltage generated by rods and magnets in a coil and to apply Faraday’s Law to define the value of EMF and look at its dependency o ... n the magnetic field, frequency, angle between the axis and direction of the magnetic field. 2. Description We used Capstone to observe the changes in voltages through the graphs and the RLC circuit board, coils and iron rod to test Faraday’s Law in different scenarios. 3. Procedure First, we used an iron rod and a magnet to move them in and out of the coil and recorded a graph. We moved the rod at different speeds and dropped the magnet. Next, we recorded the graphs of a moving coil with steady current and a moving coil with switched currents. Then, we reversed the two leads from the power amplifier to the coil, moved the coils apart, and passed the iron rod between the coils. Then we made a handmade coil and sent the magnet back and forth through the coil and observed the voltage polarities. 4. Questions and Answers Why is there a negative sign in Faraday’s Law? The negative sign in Faraday’s Law expresses Lenz’s Law which expresses the conservation of energy. How can you determine the magnetic pole that is being inserted into the coil? Explain. We follow Lenz’s Law because it states that the direction of the induced current in the loop opposes the change in the flux. Try not moving the magnet at all. Is there an induced voltage? Explain. Yes, there is still an induced voltage, there is always an induced voltage between the magnet and the coil. Turn the axis of the magnet perpendicular to the axis of the coil and bring the magnet down onto the coil. Across the coil is there an induced voltage? No. [Show More]

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