alleryA device takes 120 W input and produces 90 W output. Its efficiency is…
A75%
B133%
C90%
D30%
Answer & Solution
Correct answer: A. 75%
Efficiency equals 90/120 = 0.75, or 75%.
Keep practising Force and Machines
Browse all Force and Machines questions for ICSE Class 10, or explore more Physics topics.
Related questions
Match each common object with the position of its Center of Gravity:Match each circular motion dynamic concept with its definition:Match each rotational equilibrium condition with its rule:Match each rotational mechanics term with its formula and unit:Match each machine design factor with its practical effect:Match each pulley system with its ideal mechanical advantage (ignoring friction):Match each class of levers with the position of its central component:Match each machine parameter with its mathematical formula: