# Battery voltage v 1 9v 2 9v 3 9v 12 18v 123 27v

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Battery Voltage (V) 1 9V2 9V3 9V1+2 18V1+2+3 27V
b.How does the voltage of the battery compare to the light bulb voltage? Explain what you think is happening.
c.Vary the voltage of the battery and write observations about how the brightness is affected by voltage.
d.Think about a real light bulb and battery; explain what you think is happening that causes the changes in brightness.
III.Using voltage in series circuits Use CCK to build the circuits below with a battery at about 12 voltsand light bulbs. Turn on the voltmeter and ammeter to measure voltage of the battery and current into it. Record bulb brightness with descriptive language. Figure 1 Figure 2 Figure 3 a.Summarize the relationships you observed and explain what you think is happening. a.# of bulbsBatteryvoltage(v)Currentintobattery(A)Brightness ofbulbs112 v2.67 AVery Bright212 v1.33 AMedium312 v0.89 ALow
b.Test to see if changing the battery voltage causes you to modify any of your conclusions. Explain what you measured and any conclusions you draw from your tests. # of BulbsBattery Voltage (v)Current into Battery (A)Brightness of Bulbs125 v5.67 AVery Bright225 v2.83 AMedium325 v1.89 ALow