Chapter 1 - Delivery sheet 5

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Chapter 1: Principles of electrical science
Activity sheet 1.5: SI units
Aims and objectives
At the end of this activity, students should be able to:
● recognise base units
●
recognise the main derived units used by a building services engineer.
Suggested delivery
1. Give the students 30 minutes to complete the activity sheet in pairs.
2. Ideally the students will complete the first draft in pencil, mark it and then correct it in
pen, keeping a good copy for their notes.
3. Instruct the students to complete the missing gaps on the whiteboard in teams using the
PowerPoint™ template. Once completed, the students must create their own version
and laminate it for their personal file/notes.
Equality and diversity opportunity
Discuss the origin of some of the symbols used, such as resistance and Ohm (German scientist,
Georg Ohm, and a Greek letter).
Stretch
Encourage the students to identify a wider range of relevant units, symbols and descriptions using
the Internet/supplied material.
© Pearson Education Ltd 2013. Copying permitted for purchasing institution only. This material is not copyright free.
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Chapter 1: Principles of electrical science
Term
Symbol
Unit
name
Unit
Symbol
Electric current
I
ampere
A
Definition
A quantity (Q) of electricity crossing a section of
conductor in a time (t); commonly referred to as
current flow.
Potential difference
Resistance
Resistivity
Temperature
Mass
Force
Magnetic flux
Magnetic flux
density
Frequency
Power
Energy
Time
Length
Area
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© Pearson Education Ltd 2013. Copying permitted for purchasing institution only. This material is not copyright free.
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