SOLUTION: The power that a resistor must dissipate is jointly proportional to the square of the current flowing through the resistor and the resistance of the resistor. If a resistor needs t

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Question 712109: The power that a resistor must dissipate is jointly proportional to the square of the current flowing through the resistor and the resistance of the resistor. If a resistor needs to dissipate 144 watts of power when 6 amperes of current is flowing through the resistor whose resistance is 4 ohms find the power that a resistor needs to dissipate when 2 amperes of current are flowing through a resistor whose resistance is 3 ohms
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
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The power that a resistor must dissipate is jointly proportional to the square of the current flowing through the resistor and the resistance of the resistor.
If a resistor needs to dissipate 144 watts of power when 6 amperes of current is flowing through the resistor whose resistance is 4 ohms find the power that a resistor needs to dissipate when 2 amperes of current are flowing through a resistor whose resistance is 3 ohms
:
p = i^2*r, where:
p = power in watts
i = current in amps
r = resistance in ohms
:
p = 2^2 * 3
p = 12 watts