Wednesday, May 19, 2010

Shocking Circuits

This picture shows a series circuit. In this circuit the voltage of all the light bulbs is equal to the voltage in the batteries.The voltage in each light bulb is a third of the entire voltage, because the resistance in each of light bulbs are the same, because there are three places where the voltage needs to go. The current in this circuit is the same because the circuit is in a loop, the electrons don't have any where else to go so the current is the same throughout the entire series circuit.

This picture shows a parallel circuit. In this circuit the voltage of the light bulbs are equal, because in a parallel circuit the voltage of each light bulb is equal to the voltage that the batteries produce. In other words the voltage of one of the light bulbs is equal to the voltage in the batteries. If there are only two branches in a parallel circuit the current in the branches is equal to the total current. This is because the total current has to flow through two paths in this scenario, so half goes to one and the other half to the other.

This picture shows a complex circuit. In this circuit there is a series and parallel circuit. Just like the series the current stays the same until the current gets to the parallel part, the current splits and half goes through one branch and the other half of the current to the other. The voltage of the series light bulb is equal to both the voltages of the parallel circuit bulbs. The circuit light bulbs distribute half of the voltage to one and the other half of the voltage to the other.

Sunday, May 2, 2010

Optics Reflection

I learned about optics. How there is concave and convex mirrors and lenses. I learned how to draw the mirror and lens diagram to figure out if the image can be formed or if it becomes virtual. Concave mirrors usually form real images, but sometimes they don't, and convex mirrors always form virtual images no matter what. With lenses it is exactly the same.
In this unit actually understanding what happens with mirrors and lenses was difficult, the equations and stuff were easy but actually understanding it was difficult for me. Example like knowing when the focal length was negative and just knowing when a number is negative.
My problem solving skills have gotten better because now i know now what i need to work on in the future. Like listen more attentively during class, and understand the labs that we do. My strengths in this unit were solving the equations and that was about it. My weaknesses were drawing the diagrams, and answering the questions about optics.