Form 2 Track 2 Physics Worksheet - Annual Examinations For Secondary Schools, 2012 Page 6
ADVERTISEMENT
1
2
3
4
5
6
7
8
9
10
11Section B: Answer all questions in this section. This section carries 45 marks.
6.a.
A traffic information sign is supplied
with energy by a wind generator
and a panel of solar cells . These are
connected to a rechargeable battery.
i.
Underline the correct word.
Solar and wind are ( renewable /
non-renewable ) sources of energy.
(1)
ii.
Write in the table below one
advantage and one disadvantage of
each of the following energy sources.
Advantage
Disadvantage
Solar energy
Wind energy
(4)
2
iii.
An area of 4 m
of solar cells can generate up to 320 W. The panel of solar cells
2
used for the traffic sign has an area of 1 m
. Calculate the maximum power output
that can be generated by the panel of solar cells.
________________________________________________________________________________
________________________________________________________________________________
(2)
iv.
If the solar panels receive 400 W of sunlight, calculate their efficiency. Use the
Useful
energy
output
Efficiency =
formula
x
100%
Useful
energy
input
________________________________________________________________________________
________________________________________________________________________________
(1)
b.
The table shows the power produced by the wind generator at different wind speeds.
Power output (W)
8
16
24
32
40
2
4
6
8
10
Wind speed (m/s)
i.
Draw a graph of power output (y-axis) against the wind speed (x-axis).
(5)
ii.
Use your graph to find the power produced when the wind speed is 7 m/s.
________________________________________________________________________________
(2)
Page 6 of 11
Physics – Form 3 Secondary – Track 2 – 2012
ADVERTISEMENT
0 votes
Related Articles
Related forms
Physics Annual Examinations For Secondary Schools Form 5 - Directorate For Quality And Standards In Education, 2012
Education
Annual Examinations For Secondary Schools 2015 (physics) Worksheets - Department For Curriculum Management
Education
Related Categories
Parent category: Education