Page 543 - SUBSEC October 2017_Neat

UNIT 2
MODULE 1: ELECTRICITY AND MAGNETISM (cont’d)

SPECIFIC OBJECTIVES EXPLANATORY NOTES SUGGESTED PRACTICAL
ACTIVITIES

Electrical Circuits (cont’d)

Students should be able to:

2.8. use the formula for two or
more resistors in series or
parallel;

2.9. use the potential divider as a Introduce students to a Construct potential divider
source of variable and fixed metre-bridge, for example, to provide both variable and
p.d.; and, potentiometer. fixed p.d.

2.10. use the Wheatstone bridge Treat as a double potential Use the Wheatstone bridge
as a means of comparing divider. to determine unknown
resistances. resistance.

3. Electric Fields

Students should be able to:

3.1. explain the difference An electron model
between electrical should be used in the
conductors and insulators; explanation.

3.2. use Coulomb’s Law: Consider combinations of
= 1 2 to calculate the charges in very simple
4 0 2 arrangements. Use a
force between charges in vector approach to
free space or air to solve determine the resultant
problems; force on a single point

charge due to other point
charges.

3.3. use = for the field E is a vector.
4 0 2
strength due to a point
charge;

3.4. calculate the field strength Consider potential
of the uniform field between difference and separation

charged parallel plates; of the plates. =

CXC A16/U2/17 43