Introduction to Biasing

Introduction to Biasing

In this lecture we talked about circuits of series and parallel circuits

During Lecture, the Professor asked us what happens if we turn the switch (the square) from off to on.  The long line with a short line under is considered the battery and the circle is the bulb. Initially the two bulbs were lit and then the switch was turned on. However, despite the switch being turned on, the two bulb's brightness were still the same. This is because the battery on the right isn't really contributing to how bright the bulbs are. 

The second part of the lecture involves finding the "Hot" Resistance and the "Cold" Resistance.  However, there was only enough information to find the Hot Resistance but not enough information to find the Cold Resistance. Thus, using the Equation of P = VI to get to P = V^2/R, we find the hot resistance and leave the cold resistance as Less than the Hot resistance which is 190 ohms. 

Resistor and Ohms Law

In this lab, we find the graph of Voltage vs Current by checking to see how much current is there as the voltage increases. 

For Finding the Current, we set up the breadboard and connected it to the Analog Discovery which is then connected to the power source and the DMM (Tool used to measure Current). 

 From the DMM, the current is shown to increase as when the voltage goes further up. What is shown below is a graph of Voltage vs Current Graph.

Current (mA)	Voltage (V)
29.1	3
44.4	4.56
59	6.05
73.4	7.51
88.9	9.04
119.2	12.01

Summary

In Short, what we did in the lab and lecture was learn about Circuits involving batteries, current, voltage, and Resistors by showing the circuits involving the two bulbs. In the lab, we apply it to find out the current vs voltage graph. It is shown that current gradually increases as more voltage is increases due to the equation: V=IR.