Page 542 - SUBSEC October 2017_Neat

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

SPECIFIC OBJECTIVES EXPLANATORY NOTES SUGGESTED PRACTICAL
ACTIVITIES

2. 2Electrical Circuits
.
Students should be able to:

2.1. compare Ohmic and non- Explanation of these Sketch the I - V
Ohmic devices using an IV characteristics in terms of characteristic for a metallic
graph; the variation in resistance conductor at constant
of the device. temperature, a
semiconductor diode, and a
filament lamp.

2.2. sketch the variation of Also include different types
resistance with temperature of thermistors and discuss
for a thermistor with the differences between
negative temperature co- the R – T characteristics.
efficient;

2.3. solve problems involving Use examples of different Determine resistance of
terminal p.d. and external types of source, for small battery or small solar
load, given that sources of example, primary and cell.
e.m.f. possess internal secondary chemical cells,
resistance; solar cells, generators.

2.4. draw circuit diagrams;

2.5. interpret circuit diagrams; Consider d.c. circuits
involving sources of e.m.f.
and resistive circuit
elements.

2.6. apply Kirchhoffs laws to Consider d.c. circuits
given circuits; involving sources of e.m.f.
and resistive circuit
elements. Kirchhoff’s First
Law is a consequence of
conservation of charge and
Kirchhoff’s Second Law, a
consequence of
conservation of energy.

2.7. derive the formula for the
effective resistance of two or
more resistors in series or
parallel;

CXC A16/U2/17 42