Page 394 - SEC_2017WorkingDocument_Neat

NOT on the syllabus. to be known
 The syllabus objectives in Unit
1 Module 3 [Thermal and
Mechanical Properties] make
no explicit mention of the
“Continuous flow method for
measuring the specific heat
capacity of water”.
 Specific Objective 2.4 states:
“perform experiments to
determine the specific heat
capacity of liquids and metals
by electrical methods and the
method of mixtures”.

Physics: CAPE Unit 2

Quest Comment Recommendations
ion
-9
1e  The syllabus objective in Answer: 6.26 x 10 F OR 6.28 x
Unit 2 Module 1 makes no explicit 10 F OR 6.3 x 10 F
-9
-9
mention of the formula relating Other Answer:
relative permittivity and (absolute) If in (d) (ii) students say that k is
permittivity. permittivity
 Unit 2 Module 1 [Electricity And in (e) the students then use it to
and Magnetism] Specific Objective calculate C, then they will get 707 F
2.21 states: OR 710 F
“use the formula C   A/d.
Refer to the use of dielectrics to
produce capacitors of larger values
with the same dimensions.
Mention the types of dielectrics and
the range of their dielectric
constants or relative permitivity.
2b(iii) “determine the frequency We suggest that those students getting
response curve”. This statement is the correct answer for the bandwidth
very confusing. should get all 5 marks. Teachers’
Answers ranged from f = 3162 to 3981
“hence the bandwidth of the Hz.
circuit when Rf = 100 kΩ and R1
= 330 Ω”
Which circuit? It can’t be the open

49