Physics 9702/34 — October/November 2023

Cambridge AS Level · Advanced Practical Skills · worked solutions for every part, with the mark scheme

questions

marks

120

minutes

Topics Manipulation, Measurement and Observation · Presentation of Data and Observations · Analysis, Conclusions and Evaluation

Q1Manipulation, Measurement and ObservationPresentation of Data and ObservationsAnalysis, Conclusions and EvaluationFree sample

In this experiment, you will investigate an electrical circuit.

(a)

Connect the circuit shown in Fig. 1.1.

Fig. 1.1

● S, T and U are crocodile clips.

Connect one of the resistors labelled with its resistance in the component holder as resistor $R$ , and record its resistance $R$ .

$R$ = ______

● Close the switch.

● Place U on the wire and adjust its position so that the voltmeter indicates as near to zero as possible.

● The distance between S and U is $a$ and the distance between U and T is $b$ , as shown in Fig. 1.1.

Measure and record $a$ and $b$ .

$a$ = ______
$b$ = ______

● Open the switch.

(b)

Change $R$ and determine $a$ and $b$ . Repeat until you have six sets of values of $R$ , $a$ and $b$ .

Record your results in a table. Include values of $\frac{1}{R}$ and $\frac{b}{a}$ in your table.

10M

(c)

(i)

Plot a graph of $\frac{b}{a}$ on the $y$ -axis against $\frac{1}{R}$ on the $x$ -axis.

(ii)

Draw the straight line of best fit.

(iii)

Determine the gradient and $y$ -intercept of this line.

gradient = ______
y-intercept = ______

(d)

It is suggested that the quantities $b$ , $a$ and $R$ are related by the equation

\frac{b}{a} = \frac{M}{R} + N

where $M$ and $N$ are constants.

Using your answers in (c)(iii), determine the values of $M$ and $N$ . Give appropriate units.

$M$ = ______
$N$ = ______

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Q2Manipulation, Measurement and Observation · Presentation of Data and Observations · Analysis, Conclusions and Evaluation20M

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