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A 240 V, series motor takes 40 A when giving its rated output at 1500 rpm. Its resistance is 0.3Ω. The value of resistance which must be added to obtain rated torque at starting will be

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A 240 V, series motor takes 40 A when giving its rated output at 1500 rpm. Its resistance is 0.3Ω. The value of resistance which must be added to obtain rated torque at starting will be



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