A 400 V DC series motor develops shaft torque of 200 Nm at 80 percent efficiency while running at 1200 rpm. The current drawn by the motor in amperes is?

It's a Physics question about mechanical engineering. A shunt motor has a speed of 900 rpm when it is connected to 120 V mains and delivering 12 hp. The total losses are 1048 W. Compute the power input, the line current, and the motor torque

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In a three-phase induction motor the maximum torque occurs at 20% slip and the equivalent resistance of the secondary is 0.04Ω per phase. Find the equivalent load resistance and the load voltage and the load current. Output power is 20 kW.