Solve. -The Power That a Resistor Must Dissipate Is Jointly Proportional

question 216

Multiple Choice

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 20 watts of power when 2 amperes of
Current is flowing through the resistor whose resistance is 5 ohms, find the power that a resistor needs to
Dissipate when 4 amperes of current are flowing through a resistor whose resistance is 7 ohms.

• A) 112 watts
• B) 28 watts
• C) 56 watts
• D) 196 watts

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