D1 - Solderless Breadboards, Open-circuits and Short-circuits

Engineering 44 being taught by Professor Martin Mason.

Our class started with a question about two lights connected with a switch in the middle. Our table guessed that the Upper and lower light would become dimmer and the middle light would go on. We were wrong. We then talked about charge and current. I  is a derivative of charge per time and measured in Amps. There is AC and DC current. To find i(t) of a sine wave  take the derivative. We have pictures of the following work done in class relating to current, voltage, and power.

An example in class of i(t).

An example of current and power signals.

Worked out example of power and work. P = VI, W = Pt

After some examples we worked on our first lab:
Solderless Breadboards, Open-circuits and Short-circuits
Below are some pictures required of the lab.

Picture referring to question 1 on lab. We found very low resistance. "Short circuit"

Pic. referring question 2 on lab, we found infinite resistance. "Open Circuit"

The other lab questions were 3 and 4 pictures could not be found but they were "Open circuit" for 3 and "Short circuit" for 4.

Picture of the last question in lab. We recorded the resistance.

For the blog lab: 1) closed circuit 2) open circuit 3) open circuit 4) closed circuit.
We then moved on to talk about each circuit has power abosirbed and power supplied. We talked about passive sign convection. We then moved on to some class examples. Pictures below.

Picture of an example to be worked on for Power.

Continued example of Power. We broke up the area into triangle and square and integrated the parts together.

Another example of P in = P out. We used P = VI to find the answer of 20V

We closed the first class talking about using Matlab and Waveforms programs for later classes.

In summary:
We learned our common sense of electronics and our intuition of electrical flow is usually wrong with the light bulb example. We learned current is the change of charge per time. Power is Voltage times current. Work is Power times time. We worked out examples to solidify our understand of physics equations. Our first lab introduced how a solder-less breadboards are connected in the inside and what a short and open circuit is. P in is equal to P out, and then we were out.