Physics 0625 · IGCSE · Energy, work and power

Energy, work and power — practice question

A machine takes in $200\ \text{W}$ of power and produces a useful output energy of $1\ \text{kJ}$ in $6$ minutes. What is the machine’s efficiency?

  • A0.014%
  • B0.83%
  • C1.4%
  • D83%

Worked solution & mark scheme

This 1-mark question has a full step-by-step worked solution and mark scheme.

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI