A battery and 5 identical bulbs are arranged as shown. What happens when switch S is closed?
1.All 5 bulbs turn on with equal brightness.
2.All 5 bulbs turn on, but they do not all have equal brightness.
3.One of the bulbs does not turn on; the other 4 turn on with equal brightness.
4.One of the bulbs does not turn on; the other 4 turn on, but they do not all have equal brightness.
5.Two or more bulbs do not turn on.
6.I have no idea
Question 2Two batteries are used to light a bulb as shown. A third identical battery is connected by closing switch S. What happens to the bulb?
1.The bulb goes out.
2.The bulb gets noticeably dimmer.
3.The bulb gets very slightly dimmer.
4.The bulb's brightness stays the same.
5.The bulb gets slightly brighter.
6.The bulb gets noticeably brighter.
7.Impossible to determine
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