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TwinCamGTS
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Homework Statement
In the figure below, you will attach one or more light bulbs of R=30.12 Ω in parallel with the battery (with ε = 20 V, internal resistance r). (i will upload with work and the picture of the wiring diagram)
a.) For an ideal battery (r=0), what would be power dissipated in the first bulb if it was:
connected alone:
P=____ watt
connected as one of four bulbs:
P=____ watt
b.) For a non-ideal battery where r=1.1 Ω,
i) reanswer part a). Also, in each case find the voltage drop that would be measured across the battery terminals:
connected alone:
P=____ watt Vbattery=____ Volt
connected as one of four bulbs:
P=____ watt Vbattery=____ volt
ii) Challenge:
Suppose you wish to dim the first bulb, such that its power output is at or below ___% of its value when connected alone. Find the minimum number of total bulbs you must connect in parallel to make this happen.
Solve for a general expression so you can use it for all the cases below.
50% of its actual value
35% of its actual value
10% of its actual value
Homework Equations
V=I*R
P=(v^2)/r p=I*v p=(i^2)*r
The Attempt at a Solution
i did mostly all of them except the challenge problem. i don't know how to start. I will be grateful if someone can tell me how to do it. Thank you for your time and your help.
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