Calculate the MAXIMUM Safe current through a resistor.
Example:
Joe has a 1.8K ohm resistor and it's rated at 0.5w
What is the maximum safe current through this resistor?
Let's use the formula P = I X R^2
But let's rearrange the formula.
I = √P / R
So √P/R = I
.5 / 1800 = .0003
√.0003 =. .0167A or 16.7mA
So with this formula Joe has determined that ½ watt resistor is safe for His application.
Easy enough right?
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