rhd
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- Dec 7, 2010
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Quick check on my knowledge here -
I need a 4W resistor of somewhere around 0.4 to 0.45 Ohms. I don't have such a resistor, but I do have:
2W 1 Ohm
3W 0.75 Ohm
In parallel, they should create 0.429 Ohms of resistance, and roughly speaking, should create a resistor with the ability to distribute that 4W..... However, I know that they won't share the "wattage distribution" (I'm just making up that term) equally, since they are different resistances. IE, one resistor will be doing more work than the other. My concern is around which of the two will be handling *more* of that required 4W total.
My gut / basic logic tells me that the 3W resistor (because it has the lower resistance) is going to be doing more of the work. This would be fine (as long as it's not doing more than 3W) But if it's the other way around, I'll be in trouble.
Thoughts?
I need a 4W resistor of somewhere around 0.4 to 0.45 Ohms. I don't have such a resistor, but I do have:
2W 1 Ohm
3W 0.75 Ohm
In parallel, they should create 0.429 Ohms of resistance, and roughly speaking, should create a resistor with the ability to distribute that 4W..... However, I know that they won't share the "wattage distribution" (I'm just making up that term) equally, since they are different resistances. IE, one resistor will be doing more work than the other. My concern is around which of the two will be handling *more* of that required 4W total.
My gut / basic logic tells me that the 3W resistor (because it has the lower resistance) is going to be doing more of the work. This would be fine (as long as it's not doing more than 3W) But if it's the other way around, I'll be in trouble.
Thoughts?