12-4-2014 AC RLC Circuit

     This is a sample of the graphs we obtained through use of the voltage and current sensors hooked up into our RC circuit. In order to obtain RMS values for voltage and current, we simply took the maximum value and divided it by the square root of two. We then divided the RMS voltage by the RMS current, which gave us a value of reactance. 

In lab, we conducted an experiment in which we calculated a theoretical capacitive reactance and then used current and voltage sensors to construct graphs using LoggerPro that would be used to determine RMS voltages and currents. These voltages and currents would be used to acquire another value of capacitive reactance that we would compare to our theoretical value. We did this for two different capacitors and then found that doubling the frequency greatly reduced our percentage error. We attempted a similar process with an inductor, but found that our results we not nearly as accurate as they were with the capacitor. Also, we simply ran out of time to complete the inductor experiment in its entirety.  

12-2-2014 Induction

This is a calculation for inductance, 

This is a comparison of one theoretical induction value versus an experimental one. there is a large amount of difference.

     In addition to answering a number of questions on the ActivPhysics website on Wednesday, we conducted in an experiment in which we were to determine the inductance of the coil in the above picture. We calculated the inductance by using the dimensions of the coil and also by using the oscilloscope to estimate the half time of exponential decay. 

11-25-2014 electromagnetic induction

In this experiment a galvanometer is attached to a coil to assist in measuring the induction. The voltage is induced when a magnet it run through the coil at different speeds. This shows the relationship between a magnetic field, the change in the position oof the magnet and the current in the wire.

There is a wire wrapped around this tube in order to measure the effects of different numbers of coil and the effects on current and magnetic field.

this is the measurements of the inductance and then magnetic field as the number of coils increases.

using these values we can calculate the elength of the wire. Science is a magical and disturbing beast.