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Year 10 Energy
Test Description: Year 10 Physics questions on enrgy transfer, energy efficiency and eneryg saving mthods.
Instructions: Answer all questions to get your test result.
1) What is the name for the transfer of energy by vibrations?
A
Convection
B
Conduction
C
Radiation
D
All of the above
2) The process of warm air rising cooling and sinking is known as what?
A
Radiation
B
Convection
C
Conduction
D
All of the above
3) What is power measured in?
A
Watts
B
Newtons
C
Kilowatt hours
D
Joules
4) Through what process does heat energy from the sun reach Earth?
A
All of the above
B
Convection
C
Radiation
D
Conduction
5) How much energy is needed to heat up 2kg of water by 10 degrees. (c=4000)
A
80,000J
B
80J
C
40,000J
D
200J
6) A 1500W hairdryer is on for 30 mins. How much energy is transferred in kWhs?
A
750
B
450000
C
0.75
D
45
7) Cavity wall insulation costs £3000 and saves £120 a year. What is the payback time?
A
1 year
B
25 years
C
30 years
D
10 years
8) What does a step up transformer do?
A
Decreases voltage and decreases current
B
Increases voltage and decreases current
C
Increases voltage and increases current
D
Increases current and decreases voltage
9) Which of these applies to silver materials?
A
Good absorbers of heat energy
B
Good emitters of heat energy
C
Poor emitters of heat energy
D
Good radiators of heat energy
10) A good reason for putting pylons overground is...
A
Birds can rest on them
B
People can climb them
C
They are an eyesore
D
They are easily accessed if broken
*select an answer for all questions
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