SOLUTION: Solve. 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 resi

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: Solve. 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 resi      Log On


   

Question 824420: Solve.
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 64 watts of power when 4 amperes of current is flowing through the resistor whose resistance is 4 ohms,find the power that a resistor needs to dissipate when 3 amperes of current are flowing through a resistor whose resistance is 7ohms.
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
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 64 watts of power when 4 amperes of current is flowing through the resistor whose resistance is 4 ohms,find the power that a resistor needs to dissipate when 3 amperes of current are flowing through a resistor whose resistance is 7ohms.
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P+=+I%5E2R
P+=+3%5E2%2A7+=+63 watts