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    Physics
    Grade-9
    Easy

    Question

    Percentage of energy input that is converted to a useful form is

    1. Efficiency
    2. Energy consumption
    3. Power consumption
    4. Power efficiency

    hintHint:

    • Efficiency (%) = (useful energy output ÷ energy input) × 100

    The correct answer is: Efficiency

      • Energy input = useful energy output + waste energy
      • Efficiency (%) = (useful energy output ÷ energy input) × 100
      • Percentage of energy input that is converted to a useful form is Efficiency

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