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Practice MCQs on efficiency: o level physics, physics MCQs for online test prep. Energy, work and power quiz has multiple choice questions (MCQ), efficiency: o level physics quiz questions and answers as output of a truck is 4500 j and its efficiency is 50%, input energy provided to truck is, answer key with choices as 5000 j, 900 j, 9000 j and 500 j for competitive exam prep. Free study guide is to learn efficiency: o level physics quiz online with MCQs to practice test questions with answers.

MCQ. Output of a truck is 4500 J and its efficiency is 50%, input energy provided to truck is

1. 5000 J
2. 900 J
3. 9000 J
4. 500 J

C

MCQ. In a typical power station, amid a series of energy transfers and conversions, about 70% of energy input gets wasted in form of thermal energy, efficiency of such a power station is about

1. 0.3
2. 0.4
3. 0.7
4. 1

A

MCQ. A car uses total energy of 2500 J and output is 750 J. efficiency of car is

1. 50%
2. 30%
3. 25%
4. 80%

B

MCQ. Formula for efficiency is

1. (energy input / energy output) x 100
2. (energy input / energy output) x 100
3. (useful energy input / energy output) x 100
4. (useful energy output / total energy input) x 100

D

MCQ. Efficiency of a machine is measured by

1. (Wasted Energy Output ⁄ Energy Input) × 100 %
2. (Energy Input ⁄ Wasted Energy Output) × 100 %
3. (Useful Energy Output ⁄ Energy Input) × 100 %
4. (Energy Input ⁄ Useful Energy Output) × 100 %

C