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1. A dc motor connected to a 240 V line produces a mechanical output of 160...

1. A dc motor connected to a 240 V line produces a mechanical output of 160 hp.Knowing that the losses are 12 kW, calculate the input power and the line current.

2. An electric motor driving a skip hoist withdraws 1.5 metric tons of minerals from a trench 20 m deep every 30 seconds. If the hoist has an overall efficiency of 94 percent, calculate the power output of the motor in horsepower and in kilowatts.

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