参考答案:
(a) With the batteries connected in series, the voltage across the
bulb is higher, and so more current
will
flow. That will make the bulb glow
brighter.
(b) With the batteries connected in parallel,
each battery would only have to provide half the total
current to light the bulb, meaning that the device could be on
longer before the batteries “ran down”, as compared to a single battery. Also, if one battery should fail, the other
battery can still provide the current to light the bulb.
本题详细解析:
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