When does the starter take up liquid rheostat?
(a) when the resistance can be varied heavily
(b) when the resistance can be varied gradually
(c) when the resistance cannot be varied
(d) when the resistance should not be varied
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I want to ask this question from Motor Starters, Calculation of Resistance Steps & Design of Field Regulators topic in section Design of Small Electrical Machines, Starters and Field Regulators of Design of Electrical Machines