Hey everybody!
Maybe I overthink things...
I'm trying to teach myself electronics, yeah it's a bit bumpy, but LOTS of fun! But I have a few questions that I would be embarrassed to ask a professor, so maybe you can help me.
I am playing around with solar cells, and am trying to understand some basics, I see that some cheap cells provide say 0.5 V and 0.8 A in full sunlight, so is that to say that the cell can deliver 0.4 W to a load?
Kind of related, when a load has a power rating like 100W on a light bulb, does that mean that in order to operate normally the light bulb NEEDS 100W? If so, does that mean that ANY source that would produce 100W would light the bulb? Like some crazy solar cell that put out 0.5V and 200A?
And I'm getting confused when I see power supplies give specifications in voltage and current... I thought it was voltage that 'created' current (by Ohm's law), so why does the power supply (or whatever, solar cell.. anything) give me a current specification??? What does this mean?
Any help is greatly appreciated!!!!
Maybe I overthink things...
I'm trying to teach myself electronics, yeah it's a bit bumpy, but LOTS of fun! But I have a few questions that I would be embarrassed to ask a professor, so maybe you can help me.
I am playing around with solar cells, and am trying to understand some basics, I see that some cheap cells provide say 0.5 V and 0.8 A in full sunlight, so is that to say that the cell can deliver 0.4 W to a load?
Kind of related, when a load has a power rating like 100W on a light bulb, does that mean that in order to operate normally the light bulb NEEDS 100W? If so, does that mean that ANY source that would produce 100W would light the bulb? Like some crazy solar cell that put out 0.5V and 200A?
And I'm getting confused when I see power supplies give specifications in voltage and current... I thought it was voltage that 'created' current (by Ohm's law), so why does the power supply (or whatever, solar cell.. anything) give me a current specification??? What does this mean?
Any help is greatly appreciated!!!!