May/June 2026 Paper 62

2026 · 4 questions · 24 parts · 40 marks

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1(a)(i)1(a)(ii)1(b)(i)1(b)(ii)1(c)1(d)1(e)1(f)1(g)

–/11 mks

2(a)(i)2(a)(ii)2(b)(i)2(b)(ii)2(c)2(d)(i)2(d)(ii)

–/11 mks

3(a)(i)3(a)(ii)3(b)3(c)3(d)3(e)3(f)

–/11 mks

–/7 mks

3(a)(i)Easy1 mark

A student investigates potential difference in an electric circuit and determines the resistance of an unknown resistor X. The student assembles the circuit shown in Figure 3.1. The circuit consists of a resistor X connected in series with a resistor of resistance

R

= 10

Ω

The student:

closes the switch
connects a voltmeter in parallel with resistor X
measures the potential difference (p.d.) $V$ across resistor X
opens the switch.

On Figure 3.1, draw the voltmeter connected to measure the p.d. across resistor X.

Draw with the mouse or a finger.

3(a)(ii)Easy1 mark

The voltmeter reading is shown in Figure 3.2.

Figure 3.2, an analogue voltmeter with a scale from 0 to 3 V and a needle to be read

Record the voltmeter reading

V

in the second column of Table 3.1 for

R

= 10

Ω

Table 3.1

resistance $R$ / $Ω$	p.d. $V$ / V	$\frac{1}{V}$ / $\frac{1}{V}$
10
15	1.6
18	1.5
22	1.3
33	1.0

3(b)Easy2 marks

The student repeats 3(a) by replacing the 10

Ω

resistor with resistors of resistance

R

= 15

Ω

, 18

Ω

, 22

Ω

and 33

Ω

in turn. The student records the values of

V

in Table 3.1. Calculate the value of

\frac{1}{V}

for each value of

V

. Record your values of

\frac{1}{V}

in Table 3.1 to 2 significant figures.

\frac{1}{V}

for

R

= 10, 15, 18, 22 and 33

Ω

3(c)Medium4 marks

Plot a graph of

\frac{1}{V} / \frac{1}{V}

(

y

-axis) against

R

Ω

(

x

-axis). Start your axes at the origin (0, 0). Draw a best-fit straight line.

Draw with the mouse or a finger.

3(d)Easy1 mark

Determine the gradient

G

of your line. Show all your working and indicate on the graph the values you use.

G

3(e)Easy1 mark

Extend your line so that it meets the

y

-axis. Record the intercept

c

that your line makes with the

y

-axis.

c

3(f)Easy1 mark

The resistance

R_{X}

of resistor X can be calculated using the equation:

R_{X} = \frac{c}{G}

Use your answers to 3(d) and 3(e) to calculate

R_{X}

. Record your answer to the nearest ohm.