- #1
danago
Gold Member
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Hey all. I've never really done anything in the way of circuit theory up until now, where i have just started a unit on introduction to electrical/electronic engineering.
Lets say i have a 60W light globe. Does this mean that the maximum power it can dissipate is 60W, after which it will blow? Will it still be able to output less energy than stated?
For example, let's say i have a very basic circuit with a 60W globe and a 10V source voltage. According to KVL, the voltage across the globe will also be 10V, and then according to the relation P=VI, the current will be 6A? What if i now take a 0.01V source. Then by the same reasoning, a current 6000A would flow?
That definitely doesn't look right to me; it seems so very unrealisting for a 0.01V source to produce a current of 6000A, which would then tell me that the globe isn't actually outputting 60W anymore. If so, how can i find what power it is actually dissipating?
Am i on the right track, or have i completely missed something?
Thanks in advance,
Dan.
Lets say i have a 60W light globe. Does this mean that the maximum power it can dissipate is 60W, after which it will blow? Will it still be able to output less energy than stated?
For example, let's say i have a very basic circuit with a 60W globe and a 10V source voltage. According to KVL, the voltage across the globe will also be 10V, and then according to the relation P=VI, the current will be 6A? What if i now take a 0.01V source. Then by the same reasoning, a current 6000A would flow?
That definitely doesn't look right to me; it seems so very unrealisting for a 0.01V source to produce a current of 6000A, which would then tell me that the globe isn't actually outputting 60W anymore. If so, how can i find what power it is actually dissipating?
Am i on the right track, or have i completely missed something?
Thanks in advance,
Dan.