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प्रश्न
Write the relation of efficiency of an actual machine.
लघु उत्तरीय
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उत्तर
For an actual machine, the efficiency (η) is always less than 100% (or less than 1) due to friction and the weight of moving parts.
Mathematical Relation:
Efficiency (η) = `"Mechanical Advantage (M. A.)"/"Velocity Ratio (V. R.)" < 1`
Alternatively:
Efficiency (η) = `"Work Output"/"Work Input" xx 100%`
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