Energy Revision 3

What is the input energy?

• light

• heat

• electrical

Select the output energy types

• electrical

• light

• sound

• thermal

• kinetic

In a Sankey diagram, the longer the arrow, the more energy it represents.

• True

• False

In a Sankey diagram, the thickest arrow will always be the _________ energy.

The Sankey diagram shown matches which example?

• toaster

• LED bulb

• car engine

• kettle

The Sankey diagram shown is for a light bulb. Is the bulb efficient?

• Yes

• No

What is the efficiency of the bulb?

What percentage of energy is wasted by the bulb?

What is the useful form of energy for a radio?

• electrical

• sound

• light

• magnetic

If a hair dryer is efficient, what should be the largest output energy?

• heat

• sound

• wind

• electrical