
Energy Efficiency, Sankey Diagram and Power

Quiz
•
Physics
•
9th - 10th Grade
•
Medium
+4
Standards-aligned
Jatto Johnson
Used 5+ times
FREE Resource
25 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A kettle uses 100J of electrical energy to produce 7J of sound energy and 93J of thermal energy. How efficient is the kettle?
100%
7%
93%
95%
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A washing machine uses 250J of electrical energy to produce 125J of useful energy. How efficient is it?
5%
50%
55%
100%
Tags
NGSS.MS-PS3-5
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A hairdryer uses 300J of energy to produce 60J of sound energy and 240J of thermal energy. Calculate it's efficiency.
80%
90%
20%
100%
Tags
NGSS.MS-PS3-3
NGSS.MS-PS3-5
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
An iPhone charger coverts 75J of electricty in to 50J of charge and 25J of thermal energy. How efficient is the charger?
10%
100%
33%
67%
Tags
NGSS.HS-PS3-3
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Tags
NGSS.MS-PS3-3
NGSS.MS-PS3-4
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Tags
NGSS.MS-PS3-3
NGSS.MS-PS3-4
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Efficiency is calculated by useful energy output divided by total energy input, expressed as a percentage
False
True
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