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New York University PHYSICS 202: Lab Report 8: Electromagnetic Induction. Includes the Questions and Answers.

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New York University PHYSICS 202: Lab Report 8: Electromagnetic Induction. Includes the Questions and Answers. Objective The objective of this lab is to examine the induced voltage generated by r... ods and magnets in a coil and to apply Faraday’s Law to define the value of EMF and look at its dependency on 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 expressesthe conservation of energy. How can you determine the magnetic pole that is being inserted into the coil? Explain Try reversing the current to the coil by switching the leads. What are the differences and why? M does not depend on the current. Is it possible to orient the two coils so that M is zero? Why or why not? ay the wired coil on top of the circuit board coil and do not move the coils. Now see what happens when you use frequencies of 1500, 2500, 3000, and 5000 Hz. Does the voltage across the wired coil change? You should also find that the induced voltage across the circuit board coil does not change very much! Why? With Capstone running on the last applied frequency insert an iron cylindrical rod between the two coils. What are differences in the induced voltage between handmade coil and the gilley coil used in section 3? Why? [Show More]

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