Experiment 4 report

# From eq 5 l 100 2 mh for 100ω resistor l 1020 2 mh

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From Eq. 5: L = 100 ± 2 mH (for 100Ω resistor) L = 102.0 ± 2 mH (for 10Ω resistor) 100Ω Error propagation: 10Ω 13.1 Error propagation: Looking at the results of the t-values, we can see that the inductance value measured does not agree with the labeled value that we had during lab. The acceptable t-value is around 2 and since the t-values obtained at 13.1 and 13.76, the inductance values measured are not acceptable. 3. How is the steady state voltage (t τ) of the inductor related to the total resistance in the circuit? Can you determine its value knowing R L , R R and the applied voltage? Unknown Inductance: 1. Is this value different than in the absence of the iron core? What about the iron core may have changed this value? How does the magnetic field passing through the solenoid relate to its inductance? L = τ*R Without iron core: L = (0.001)(100.5) = 0.1005 mH With iron core: L = (0.01)(100.5) = 1.005 mH The value of the inductance with the iron core is approximately 10 times higher than the inductance value of the inductor without the iron core. The iron core has a higher permeability

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value than air and in turn causes the inductor with the iron core to have a higher inductance value because more magnetic fields are being generated to oppose the change that induced it. Magnetic fields passing through the solenoid relate to its inductance because having more magnetic fields being produced in the inductor, the higher the inductance value will be. 2. Keep in mind how the geometry of the solenoid differs from that of the inductor circuit component (area, number of turns of wire, etc.), how might this affect the value of inductance? What does this suggest is the origin of inductance? There are many factors that will affect the inductance value of a coil. The number of turns in the coil, the coil length, the diameter of the coil and the material used in the core all affect inductance. Knowing what can affect the value of inductance; this suggests that the origin of
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