May 5 2015

This is an electric gun. It shoots electron after let it pass a constant electric field to fix his pass and reduce the influence from gravity.

There is a think like electric gun in it. The screen shows us the path or graph based on the motion of the electric.

This is our pridiction that the function graph will looke like and the output based on the first out put that professor shows to us.

We solve a problem that about motion of a electron passes through a constant electric field. It is just like solving projectile motion in 4A.

We are given a frequency supplier. we connect it to the wire electron gun. It will give us different graph if we use the frequency supplier to change frequency or voltage. Voltage influence the magnitude of the sound while  frequency influences the tone.

We perform a sample run by provide AC current to the equipments, and this is the graph it gives us. This graph is reasonable cause the current changes direction all the time.

We answer question and make explaination for the lab result on the lab manual. We also follow the instruction from the lab manual to perfrom following activities.

By changing the frequency and make correction of battery supply and other option, we got a new graph. It is a trig function graph.

By changing the function option from the frequency supplier, we got another strange graph that describe the motion of the electron.

This time we use a DC circuit, and we got a trig function, which is normal to our usual prediction. Over all, in most cases, the motion of the electron that influenced by a stable current should be a trig function.

This time we connect 2 battery supply to the wire electron gun. It gives us this graph probably because the 2 current both influences the motion of the electron.

We perform a mystery box experiment. By measure the graph the electron gun gives us, we want to know the voltage between each color combination.

Summarize: today is not a lecture day, all the thing we did is to observe the graph that electron gun shows on the screen cause the graph tells us about the motion of the electron. Current and electric field all influence the motion of electron. Like the myestry box activities, by compara the graph of different color combination, we can know the voltage combination.