This week we furthered our education in conventional currents by learning about resistors and how to find resistivity. In a conventional current you usually have two things a battery and a resistor. In the schematic diagram above the battery is shown as a V, with the bigger or positive lines, and the smaller or negative lines. The batteries in this diagram are in a series. The battery is what gives the volts and the resistor obviously resists the charges flow makes the charges work. A resistor is represented with an R, which is equal to volts over amps. The unit for a resistor is ohms, which is represented by the omega symbol. A resistor has a certain amount of resistivity. Resistivity is how resistive an object is. To find an object's resistivity you divide the length of the material by the cross sectional area, then you multiply the quotient by rho, which is the constant for how resistive the material has. So work son!
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