Light Bulb Resistance

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Description:

The left panel shows a light bulb connected to a voltage source. The circuit voltage is controlled by the slider at lower left. Voltage is measured by the voltmeter (solid green circle) in parallel with the light bulb, and is given in volts (V). The current is measured by an ammeter (solid yellow circle) in series with the light bulb, and is given in milliamps or amps(mA or A). (Voltage and current values can be read by placing the cursor over either meter or from the graph in the right panel using a left-button mouse click.)

Adjust the voltage to the light bulb using the slider and observe the electric current through the bulb as plotted on the graph at right.

Question:

Determine the resistance (in ohms) of the light bulb. Show and explain all your work.

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