thermometer.
6
Eecay Queetlone
7 (a) Diagram 7 shows two ammeters, J and ( withdifferent sensitivities that can be used in electrical
circuit to measure the current.
(a) AmmeterJ
(b) AmmeterK
Diagram 7
What is meant bysensiflvify? li morkl
With reference to Diagram 7(a) andDiagram 7(b), determine the currentsmeasured by the ammeters. 12 morksl
Compare the sensitivities of ammeters Jand K. Relate to the scales on the ammeters.
[3 morks]
(b)
G)
Using the different distributions of shooting marks
on a target, illustrate the differences betweenaccuracy and consistency.
14 morksl
(i) Civen a glass rod and a metre rule as shownin Diagram 8, explain how a student can
determine the diameter of the wire.
16 morksl
glass rod
' Diagram 8
Suggest a more suitable measuringinstrument which the student can find in thelaboratory to measure the diameter of thewire. 11 morkl
Which method will give you a more accurate
measurement? Explain your answer.
11 morkl
State the precautions that should be taken
during the measurements using theinstrument in (c)(ii).
12 marksl
the thermometer?
11 morklin the mercury when
in a cup of hot water.
l1 mork)bulb has a thin wall.
lt marklmercury thermometerof its bore. Underline
brackets to complete the
with (largea, smaller) bore
lt morkl
series of measurementsity, g. Table 2 shows the
g rs 9.8), which studentthat could be described as
(D
(iD
(iD
(iiD
(iv)(iiD
11 markl
11 mork)divisions of four types of
student should use to
of wire, 11 mork)diameters of a
laboratory. I markl
A student carries out an experiment to find out the relationshp between the period for one oscillation of a simple
and the height of the pendulum bob above the bench, h.arrangement of the apparatus is shown in Diagram 1.
bench surface
side view
Diagram I
is provided to judge if the pendulum bob passes through the centre of the oscillation.height, h of the centre of the pendulum bob is adjusted to be 30.0 cm above the bench surface. lt is then
and allowed to oscillate. The time for 20 oscillations, f,, is taken using a stopwatch. The simple pendulum is
to oscillate again to obtain the time for 20 oscillations, f2, for the second time. The actual readings of f, and f, are
in Diagram 2.
lntroduction to Physics
I
I
l-tnin rtrins
I
I
Snendulum boo
ftl- marker
\ -/" one complete
"-Yl oscillation
front view
/sN The experiment is repeated by changing the vertical height of the centre of the pendulum bob to 40.0 cm, 50.0 cm,
60.0 cm and 70.0 cm. The corresponding readings of the stopwatch are shown in Diagrams 3, 4,5 and 6 respectively.
The period of oscillation, I, of the simple pendulum is given by the following equation:7 t. +t^T:; where I
First reading Second reading
30.0 cm
First reading Second reading
h:40.0 cm
rr
Diagram 2 h: Diagram 3
t1
Second reading
50.0 cm
fl
Diagram 4 h:
First reading Second reading
f,:" " " tr:"""""Diagram 6 h:70.0 cm
(a) For the experiment described, identify;(i) the manipulated variable,(ii) the responding variable,(iii) a constant variable.
(b) BasedonDiagrams2,3,4,5and6,determinet,,fr, l,Tandr'whenh:30.0cm,40.0cm,50.0cm,60.0cmand70.0 cm.Tabulate your results for t,t,i, f and r'for each value of h.
(c) On a piece of graph paper, plot a graph of 12 against h.
(d) Use your graph to state the relationship between r'? against h"
First reading First reading
Diagram 5
Second reading
') '"'" '
h:60.0 cm dT(:,t.t
l7 morksl
15 morksl
l1 norkl
d
ffiffiw ffiw
lntroduction to Physics