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

of power when

of current is flowing through the resistor whose resistance is

find the power that a resistor needs to dissipate when

of current are flowing through a resistor whose resistance is

◦ 192 watts
◦ 24 watts
◦ 120 watts
◦ 72 watts