Answer
a). No. Efficiency only describes what part of input energy is converted to output energy or any other form of energy.
b). Not necessarily. If given power is net power, then it has considered factors in efficiency. However, one could run a less powerful machine longer to do more work.
But if given power is not net power, one has to take efficiency into consideration. If 2 machines with same rated gross power have different efficiencies, the more efficient machine will do more work.
Work Step by Step
a). No. Efficiency only describes what part of input energy is converted to output energy or any other form of energy.
b). Not necessarily. If given power is net power, then it has considered factors in efficiency. However, one could run a less powerful machine longer to do more work.
But if given power is not net power, one has to take efficiency into consideration. If 2 machines with same rated gross power have different efficiencies, the more efficient machine will do more work.
