A working electric motor takes a current of 1.5 A when the p.d across it is 250V. If its efficiency is 80%, the power output is
Answer Details
The power output of the electric motor is given by the formula: Power output = Efficiency x Power input The power input can be calculated using the formula: Power input = Voltage x Current Substituting the given values in the above formula: Power input = 250V x 1.5A = 375W Now, using the efficiency of 80%, we can calculate the power output: Power output = 0.80 x 375W = 300W Therefore, the power output of the electric motor is 300.0W. So, the correct option is: 300.0W.