Finding Resistance of an Unknown Component
In this lab, we measured the resistance of an unknown component by collecting data using TinkerCad and LT Spice. In these softwares, we constructed a circuit including a power source (voltage) and two resistors also hooked up to an ammeter that allowed us to retrieve the data necessary. Given the ability to change the voltage in TinkerCad, we recorded the output of current read on the ammeter. In LT Spice, we ran an analysis that retrieved the data of the flow of current through the wires from different points in the circuit. This lab allowed us to learn the software and also aprehend an understanding through the use of ohms law. Ohm's law states that V=I*R where V, I, and R represent voltage, current, and resistance respectively. Given from our lab the voltage and reading of amps. we could compute the resistance in the unknown component. These values are also represented by the given graphs below where R = V/I.
A voltage divider is a circuit that takes and produces an output voltage that is lower than the input voltage. This output is just a fraction of the input. Our circuit that we set up in this lab is a voltage divider given that it had an input voltage and two resistors that gave an output voltage. In our circuit, we knew the output voltage though so we had to find the unknown value of resistance. Having a voltage divider allows an easier measurement of the resistive sensors. If you are given the output voltage it is easy to find the resistance of an unknown, given the lab we just did.