Question 442Electricity & Electronics - Assistant Engineer

The correct answer is D) 80 amps. To calculate the current rating of a DC motor, we can use the formula: Power (in watts) = Voltage (in volts) x Current (in amps). Given that the motor is rated at 10 kW (10,000 watts) and 125 volts DC, we can rearrange the formula to solve for the current: Current = Power / Voltage, which gives us 10,000 watts / 125 volts = 80 amps. The other options are incorrect because: A) 4.6 amps is too low for a 10 kW motor at 125 VDC. B) 8.0 amps is also too low for a 10 kW motor at 125 VDC. C) 46.2 amps is too low for a 10 kW motor at 125 VDC.