Question detail

If a device has an efficiency of 0.90, what percentage efficiency does it represent?

Try the question, check the answer, then read the explanation to understand the curriculum point.

At a glance

MCQ

Type

practice

Style

Topic

Conservation and dissipation of energy

Question

90%

To convert a decimal to a percentage, multiply by 100. Thus, 0.90 becomes 0.90 x 100 = 90%.

Confusing Efficiency Representation

Students often express efficiency as a fraction instead of a decimal.

To express efficiency as a decimal, divide the useful energy output by the total energy input and ensure the result is in decimal form.

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