Intro To DC Circuits
Objective:
The objective is to determine how long the cables for a circuit can be while still supplying enough voltage to a load to be functional. This can apply to real applications such as a remotely operated vehicle that may be powered remotely via wire.Introduction:
- Our "load" is rated to consume 0.144W when supplied with 12V
- "Load" will operate properly as long as the voltage is greater than 11V
- Battery voltage is a constant 12V (approximately) with a capacity of 0.8Ahr.
Experiment:
For the experiment the wires connecting the load to the battery are simulated using resistors. As shown. Using Digital Multi-meter we determine the appropriate values for the resistance of the cable.
Our load is represented with a resistor of 1000 Ohms. This was calculated using the rated values and the equation:
R=V2/P
The circuit was set up and the power supply set close to 12V. Both this voltage and the current in the circuit were measured.
The Cable resistance which was modeled with a variable resistance box was then adjusted in order to obtain the minimum value of 11V for the load.
This occurred at a value of 98Ω.
DATA:
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