Consider the two arrangements of batteries and bulbs shown. All four bulbs are i

Question

Consider the two arrangements of batteries and bulbs shown. All four bulbs are identical and have resistance R.
The two batteries are identical
and maintain a potential

difference V0. Answer the
following questions and explain
why you believe your answer.
(Most bulbs are brighter when
there is more current through them. Assume that is the case for these bulbs.)
a. In system 1, which bulb is brighter?
b. In system 2, which bulb is brighter?
c. Which bulbs are brighter, those in system 1 or those in system 2?
d. If one bulb in each system burns out, will the other bulb go out as well? Why? If

the other bulb doesn

Explanation / Answer

In system 1, which bulb is brighter?

Both bulbs have the same brightness. Since the bulbs are in series, they have the same current and since they are identical, they also have the same voltage drop across them (half the voltage provided by the battery each).

In system 2, which bulb is brighter?

Both bulbs have the same brightness. Since the bulbs are in parallel, they have the same voltage drop across them as is provided by the battery and since the bulbs are identical, they have the same current through them (half the current through the battery each).

Which bulbs are brighter, those in system 1 or those in system 2?

The bulbs in system 2 are brighter.

If one bulb in each system burns out, will the other bulb go out as well? Why? If the other bulb doesn

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