Note AcademyNote Academy
Start

Physics · Oct / Nov 2021 · Paper 62 · Question 3

0625

As printed in the paper

The question as text

A student investigates the image produced by a lens. Fig. 3.1 shows the apparatus. illuminated object u v lens screen bench Fig. 3.1

Read automatically from the paper; the printed page above is exact.

Show the answer and mark scheme

  • 3(a)[1]

    u / v = 0.25

  • 3(b)[4]

    axes correctly labelled with quantity and unit and right way round

    suitable scales with u axis starting at 15.0

    all plots correct to ½ small square

    good line judgement, thin, continuous line

  • 3(c)[2]

    method clearly shown on graph

    value correct to within ½ small square

  • 3(d)[2]

    Correct value for f – candidate’s (c) ÷ 2

    to 2 or 3 significant figures

  • 3(e)[2]

    Read both parts of the answer together and award the marks in either order

    deciding the screen position for most clearly focused image

    move screen slowly / backwards and forwards

    OR

    the image is difficult to see

    carry out in a darkened room / away from bright lights

    OR

    (metre) rule moving

    clamp rule / tape rule to bench

    OR

    the image is (small and) difficult to focus

    use a bigger object

    OR

    difficult to find the centre of the lens

    use a marked lens holder

    OR

    object, (centre of) lens (and screen) are not at the same height above the bench

    use a ruler / set-square to check

Practise this paper →

Make a free account to save your answers and see your weak topics and ask the AI why a wrong answer is wrong.