More AC Circuits

We began by working with an LRC circuit. This involved a capacitor, resistor, and inductor



Here we used several of our formulas to calculate values



For our lab we needed to find the resonance for our LRC circuit



Here are our calculations for the above lab. Anddddd that is the last lab, aaaBOOOYAHHH

Ac Circuits

Here we used our lab tools to record voltage and current for an AC power supply.



Above we graphed the data from the previously mentioned lab.



Here we measured the reactance of a capacitor



The last lab performed we connected a resistor and a capacitor in an AC circuit. We calculated the total resistance/impedence

Inductance

We began today by discussing the topic of inductance. We then represented it mathematically.



In our lab setup we used a resistor, function generator, and oscilloscope to calculate the inductance of an object

Here our are calculations for the above lab

Magnetism part 2

Here we dealt with the issue of two current carrying wires and the forces between them. When they flow in the same direction they attract, the opposite and they repel





Here we measured the magnetic field with different amounts of coil. It increase with the amount of coils

Placing a magnet down two separate pipes, one metallic, it took longer for it to go down the metallic one. This is because the reaction force is to oppose the cause of it.

Magnetic Motors

Today we explored more on magnets, as well as how they can be used as motors

We first viewed the difference between a magnetic pin and nonmagnetic pin. The magnetic pin has all its small molecular poles pointing in one direction, which causes a net magnetic affect. We found that heating a magnet will destroy its magnetic property.



We then wrote an equation for torque on a current loop of t = u x B. u = IA. Above we solved a sample problem involving torque.



Here is a St. Louis motor, which is run off of a normal battery, which magnetizes the wires around the center loop. This interacts with the magnets on the side and creates motion



We attempted to make our own motor, but could not get it to work. Instead we took a video of another group who made a simpler motor work.



We also saw the magnetic field around a current carrying wire

Magnetism

Here we put a compass around a magnet to view the magnetic field around one
.

To see more clearly, we saw a picture of iron fillings sprinkled around a magnet.



Here we picked three surfaces, the big one around the whole magnet, one just to the left of the top, and one at the bottom. We found the net flux = 0, which proved the fact that a magnet can not have a single pole.


Professor Mason demonstrated the Lorentz Force with a magnet and an oscilloscope. When he approached the screen the parallel, nothing happened, but it did when it was perpendicular.



Here we sent current through a wire over a magnet. It repelled and attracted, depending on the current flow. This shows that current produces a magnetic field




Here we calculated the magnetic force of a bent wire. Instead of integrating, we just used excel.

Electronics

Here we connected a phone, which was playing music, to an oscilloscope. It displayed its accompanying wave on the screen.



Here we lit up a LED light (pictured in red next to the black wire) on a breadboard connected to a power supply. The higher the voltage, the brighter the LED shined.






















We built a sound amplifier using the breadboard, the same power supply, as well as capacitors and resistors. We also used a transistor, which amplifies electronic signals. It is composed of a collector, base, and emitter. We also learned about a diode, which only allows current to flow through one direction through it.