Wednesday, June 4, 2014

Day 23 Lab 06/02/14


Inductance:


A review on circuits which include DC and with open and closed loops, along with capacitors and inductors included in the circuit. We learned how the a voltmeter can be compared to a hole because of the infinite amount of resistance and an ammeter can be treated as a wire due to the small amount of resistance. In order to move with AC circuits we needed to understand the prior type of circuits.

The calculations of finding the voltage and other equations with the variables of L along the Tao just like capacitors. The equations of both the inductors and capacitors are practically the same but instead of C, we apply L for the insulator part of a circuit. As seen in the image, we see that the current equation is similar to the charging of a capacitor but more concerned about the resonance.

Applying the equations to finding the unknowns given a specific circuit of inductance to make the variables easier to find. BY seeing the relationships within each variable we can be able to apply the equations.

The experiment set up finding the phase shifts between the voltage potential and current when connected in series with both the coil and the capacitors on the board. By using the function generator we can apply a specific frequency to the circuit which then as a result gives us a wavy graph that shows the difference between each of the values we need to find.

This was our initial graph of the experiment however we were receiving a fluctuation of our current graph due to some error in the equipment because we tried moving the wires around but still received the same results. We can see the phase changes between the two graphs but the changes in the current graph which will give us wrong calculations in both theoretical and experimental. 

Now using a different set up from a different group's data we were able to get the correct values that we need to use to find the expected values. In this one we can also see the wave changes from both of the graphs and see the value changes more accurate  then the one we had before.

The calculations of the experiment finding the values like Xl and L to make the relationships in equations to find the values in the different situations.