Page 426 - SEC_2017WorkingDocument_Neat

MO CAPE CAPE 2018 U2 How the SO can be clarified? Status in
DU 2018 SO which final syllabus
LE SO # needs to be
# more clearly
stated
and electrolytes.

1 2.1 compare Ohmic use IV graphs to compare an Not Changed
and non Ohmic Ohmic device [eg. metallic to suggested
devices using an conductor at constant
IV graph temperature] and non Ohmic
devices [eg. semiconductor
diode and filament lamp].
1 2.2 sketch the This has already been put in Not Changed
variation of Unit1 Module 1 SO 1.4: to suggested
resistance with “Plot a calibration graph using a
temperature for thermistor”.
a thermistor
with negative Unit1 Module 1 SO 1.4 could be
temperature changed to:
coefficient; Sketch the R-T characteristics for
both a negative and positive
temperature coefficient
Also include thermistor.
different types of
thermistors and SUGGESTED PRACTICAL
discuss the ACTIVITIES Plot a R-T
differences calibration graph using a
between the R – negative temperature coefficient
T thermistor.
characteristics.

In Unit 2 Module 1, thermistors
could be included in SO 2.1
under the IV characteristics for
negative temperature coefficient
thermistors
1 2.9 use the potential Do you mean Potentiometer as a Not Changed
divider as a potential divider [using a metre to suggested
source of wire instead of 2 separate resistors
variable and in series]in order to get a variable
fixed p.d.; p.d.? OR
Potentiometer, Do you mean a metre bridge
for example, a Potentiometer used to compare
meter bridge. emfs?

81