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The effective resistance of a 2200 V, 50 Hz, 440 kVA, 1-phase alternator is 0.5 Ω. On short circuit, a field current of 40 A gives the full load current of 200 A. The electromotive force on open circuit with the same field excitation is 1160 V. Calculate the synchronous reactance and round it to 2 decimal places.