S13Phys2BaLec26B

# The brighter the bulb the more power dissipation of

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The brighter the bulb, the more power dissipation of the light bulb. I have two light bulbs, one 100W and one 60W. If I hook them up separately to the a given battery which one will be brighter? Correct, the 100W bulb was brighter! What if I hook them up in series to the same battery, which one will be brighter then?

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Clicker Question 26B-1 I have two light bulbs, one 100W and one 60W. If I hook them up in series to the same battery, which one will be brighter? A) The 100W bulb. B) The 60W bulb. C) They will have the same brightness. D) It doesn’t matter what power rating they have it will always be the one that is closest to the positive terminal of the battery.
Circuits The 60W????????????????? Realize that the power rating on light bulbs only represent the power dissipated when they are plugged into the wall. A 100W bulb will not always put out 100W of power dissipation. You have to know what the potential difference source is and what other elements are in the circuit. When examining a circuit you need to know all of the elements in the circuit (think globally).

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Batteries As we have stated before, the cause of current flow is an electric potential difference, Δ V. Batteries supply energy to keep “pumping” charge carriers. There are three basic types of emf: 1) Ideal Battery: a battery that lacks internal resistance. 2) Real Battery: a battery that contains internal resistance, r, that hampers current flow (in series).
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