Blog #18

5/5/2014 Monday

Diagram for the activity audio amplifier.

Apparatus for the audio amplifier.

In the picture showed above there is a sign wave going the middle which is from the power supply. Then the back shows the slamming of the sign wave going flat and then amplify the signal  

After many trials, the amplifier was hooked up to a speaker and an auxiliary cable with a phone to play music. Tested and it worked.

Blog #17

04/30/2014 Wednesday

Oscilloscope setup. A function generator is used to make sine wave.

Sine wave

Square wave

Wave with a lot of interference

Device that was called a mystery box for the "mystery box experiment".

The prdiction that we have to tell what kind of wave can be produce with different sets of combination.

Blog #16

4/28/2014 Monday

Apparatus of an experiment of a capacitor hooked up in power supply and Christmas light (not shown).The capacitor is charged and discharged while observing the reaction of the Christmas light.

Logger pro determines the graph of the charge and discharge

Voltage and time graph of charge and discharge of the capacitor. Blue represents the charging phase while the green on is the discharge phase.

Equations used to solve the experiment.

The C value is on the value on screen is the experimented value while the one on the calculator is the calculated value. The percent error between the two values came up to be 5%.

Blog #15

4/21/2014

Aluminum foil and book capacitor. This shows the setup for the apparatus and the first step in making the said capacitor.

The K value of the paper is 3.5. The chart shows the capacitance of the aluminum sheet. The calculated C = K*epsilon*Area/ distance between the sheets.

One way in simplifying a given capacitance diagram (above) by using the formulas bellow.

Blog #14

4/16/2014 Wednesday

Apparatus on determining the voltage in series or parallel.

Series

Parallel

Series

Parallel

Answers for a experiment problem given in the hand out.

Diagram of the problem.

Answer for the problem or the calculated value. 

A real life replica of the same problem carefully following the pattern of the resistors with the experimental value shown on the screen. Shows a very close experimental value compare to the calculated value.

Last problem from the same handout. Solving for the capacitance.

Blog #13

4/14/2014 Monday

Electric Potential experiment apparatus.

Chart shows the position of the black pointer from the red pointer. The black pointer stayed at the little gray circle. The cross is measured as 1 cm from the next cross. Note: 13-17 the voltage began to decrease.

Voltage vs distance graph of the experiment. It clearly shows a linear relationship between the two.

Blog #12

4/9/2014 Wednesday

The quiz set up that me and my group did. My team was assigned to make the set up as bright as possible with the given materials, unfortunately we did the opposite which is to make it as dim as possible.

Graph to show changes in the temperature of water. Blue used a higher voltage than the red

For the first experiment with using 4.5V the change in temperature was  2.45 +/- 1.25 degree C/ kelvin

For the second experiment with 9V the change in temperature was 9.79+/- 5.00 degrees C/ Kelvin. A person would guess that doubling the voltage would double the change in temperature but this it not the case it is roughly 1: 5. This could be from the the greater difference between the voltage and the resistance in the wire. This gap increased the power with in turn increased the change in t temperature 

A demonstration for the cooking forhotdog experiment made by the professor. The larger the gap between the anode and cathode the brighter the LED