Four identical light bulbs arc connected either in series (circuit 1) or paralle

Question

Four identical light bulbs arc connected either in series (circuit 1) or parallel (circuit 2) to a constant voltage battery with negligible internal resistance. Compared to the individual bulbs in circuit 1, the individual bulbs in circuit 2 arc 1/4 as bright. 4 times brighter. less than 1/4 as bright. more than 4 times brighter. the same brightness. If one of the bulbs in circuit 2 is unscrewed and removed from its socket, the remaining 3 bulbs go out. become dimmer. arc unaffected. become brighter.

Explanation / Answer

Part 1: the brightness is directly related to the powerdissipated in each bulb. The power is proportional to the currentthrough the bulb squared. . The current through each bulb in circuit 2 is 4 times greaterthan the current through the bulbs in circuit 1. This means thebulbs in circuit 2 are 16 times brighter than the bulbs incircuit 1. . So the answer is    4. More than 4 timesbrighter. . Part 2:   the bulbs are individually connected tothe battery, so the answer is: .    3. areunaffected.

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