Welcome to the Quiz!

This quiz contains 4 questions from a mix of 1 subtopics.

What type of diagram is used to show energy flows?

Sankey diagram

Sarcher diagram

Sotchi diagram

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1

Sankey diagram showing energy transfer for an electrical motor lifting a load with input energy of 50 J, mechanical work of 28 J, and thermal energy.

The diagram above shows the energy transfer for an electrical motor lifting a load.


How much thermal energy does the motor produce?

22

J

J

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1

Sankey diagram showing a bulb with 100 J input energy and 70 J wasted as heat energy.

This Sankey diagram shows a bulb with an input energy of 100 J. 70 J is wasted as heat energy.


Calculate the useful energy output of the bulb.

30

J

J

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1

Sankey diagram showing the input power for a kettle with 1.6 kW for heating the water and 0.2 kW wasted energy.

Above is a Sankey diagram for a kettle. 


What is the input power of the kettle? Give your answer in kW.

1.8

kW

kW

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1