(b) A 100 KW Ajax Wyatt furnace works at a secondary voltage of 12 V at a power factor 0.6 when fully charged. If the reactance presented by the charge remains constant, but the resistance varies inverse as the charge depth in the furnace, calculate the charge depth that produces maximum heating effect when furnace is fully charged.
Explanation
To calculate the charge depth that produces maximum heating effect, we need to find the resistance of the charge and minimize it. This occurs when the charge depth is maximum.
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