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# lab 7 - the recorded data What is the frequency and peak...

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Experiment: Induced EMF Experiment number: 7 Date: 3/11/2008 Questions Part I: 4. Try reversing the magnet; first put the N pole into coil. Then try putting the S pole into the coil. Explain what you observe at the output voltage. The voltage is larger on the upper portion of the graph if the N pole is out of the coil. In the same way, it is larger on the lower portion of the graph if the N pole is inserted into the coil. 5. Move the magnet in and out of the coil with a sinusoidal motion for 5 to 10 cycles and record the output voltage. Try varying the rate at which you are moving the coil. When is the voltage large? Explain why. The voltage is largest the farther down in the coil that the magnet is put. Part II: 6. Drag the recorded data from Data list “Voltage, chA (v)” to Graph Display to develop

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Unformatted text preview: the recorded data. What is the frequency and peak voltage amplitude? Voltage amplitude: 6 Frequency: 4 waves 7. Increase the frequency to 40 Hz and repeat. Now what is the peak voltage amplitude at the secondary coil output? Explain how the primary coil is inducing a voltage in the secondary circuit and the voltage changes with increasing frequency. Voltage amplitude: 7 Frequency: 8 waves It is induced by ε = -L dt di Part III: 8. Plot the voltages as a function of frequency. Explain what the slope is. y = 0.0011x + 0.0932 0.2 0.4 0.6 0.8 1 1.2 1.4 200 400 600 800 1000 1200 frequency voltage Series1 Linear (Series1) The slope shows the linear change of frequency and voltage....
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