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    Mwakican/Mjet Joint Evaluation Test Form 4 Pp2 Term One 2019

    Uploaded by

    andy gideon
    This document provides a marking scheme for a Form 4 PP2 joint evaluation test with the following key points: 1) It contains 17 multiple choice and structured questions testing concepts in physics, chemistry and other subjects. 2) The questions test principles like Snell's law, Ohm's law, properties of lenses, magnetism, and electric circuits. 3) Marks are allocated for each part of the questions, with the test totalling 100 marks overall.

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    Mwakican/Mjet Joint Evaluation Test Form 4 Pp2 Term One 2019

    Uploaded by

    andy gideon
    31 views4 pages
    This document provides a marking scheme for a Form 4 PP2 joint evaluation test with the following key points: 1) It contains 17 multiple choice and structured questions testing concepts in physics, chemistry and other subjects. 2) The questions test principles like Snell's law, Ohm's law, properties of lenses, magnetism, and electric circuits. 3) Marks are allocated for each part of the questions, with the test totalling 100 marks overall.

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    PHY F4 PP2 MS.docx

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    This document provides a marking scheme for a Form 4 PP2 joint evaluation test with the following key points: 1) It contains 17 multiple choice and structured questions testing concepts in physics, chemistry and other subjects. 2) The questions test principles like Snell's law, Ohm's law, properties of lenses, magnetism, and electric circuits. 3) Marks are allocated for each part of the questions, with the test totalling 100 marks overall.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    31 views4 pages

    Mwakican/Mjet Joint Evaluation Test Form 4 Pp2 Term One 2019

    Uploaded by

    andy gideon
    This document provides a marking scheme for a Form 4 PP2 joint evaluation test with the following key points: 1) It contains 17 multiple choice and structured questions testing concepts in physics, chemistry and other subjects. 2) The questions test principles like Snell's law, Ohm's law, properties of lenses, magnetism, and electric circuits. 3) Marks are allocated for each part of the questions, with the test totalling 100 marks overall.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    of 4

    MARKING SCHEME

    MWAKICAN/MJET JOINT EVALUATION TEST

    FORM 4 PP2 TERM ONE 2019

    1. The incident ray the reflected ray and the normal at the point of incidence lay on same plane.
    2. The angle of incidence is equal to the angle of reflection

    3. Since attraction can occur between a pole and a magnetic material, While repulsion between two like poles
    only.
    4. -forms upright image
    -wide field of view
    5. Alkaline produces higher current
    Lasts longer
    It is portable
    Less maintenance and care
    6. A- South
    B- North
    7. –iron metals
    - Keepers get magnetised by induction acquiring opposite poles that make them get attracted to the magnet
    forming a closed loop in dipoles.
    8. State the two conditions necessary for total internal reflection to occur. (2marks)
    - Light should travel from optically denser to less dense medium
    - Incidence angle greater than critical angle
    9. High melting point
    10. a) A- Micro wave
    b) Photographic film, photocell, fluorescent materials
    11. The magnet induces magnetism into the razor√1mark which in turn
    Induces the iron block√1mark hence the razor remains attracted to the iron block.
    12. The following shows a displacement time graph of a wave. The velocity of the wave is 40cm/s
    Determine the:
    i. T = 0.12 seconds

    ii. f= 1/T=1/0.12=8.333hz
    iii. wavelength= v/f= 0.4/8.333 = 0.048m
    Section B (55mks)
    13. (a) Sharp points readly attract charges from the cloud and can easily conduct them to the ground through the
    body, this leads to electrocution.
    (b) –area of overlap
    - Distance of separation.
    - Nature of dielectric material
    (c) –detecting prescence of charge
    - detecting the type of a charge
    -Detecting quantity of charge
    -insulation property
    d)i. charged
    By connecting B to A, current flow which in turn charges the capacitor
    ii. Discharged
    by connecting B to D and the capacitor acts as the source of energy
    (e) (i)

    11 x 4
    = 2.933 ȗF
    11+ 4
    (ii) Q = CV= 2.933ù x 12 = 3.5196 x 10 -5coulombs
    3.5196 x 10−5
    (iii) p.d = 12- ( ) = 3.201 v
    4 x 10−6
    14. a) Snell’s law
    the ratio of sine of angle of incidence to the angle of refraction is constant for a pair of medium
    b)A ray of light travels from air into medium 1 and 2 as shownCalculate
    sin sin 40
    i. = 1.58
    sin 24
    ii. n1sinØ1 = n2sinØ2
    1.58sin 24 = 1.33sin Ø2
    sin Ø2= 0.4832
    Ø2= 28.890

    15. a) (i) Ohm’s law


    The current flowing through a conductor is directly proportional to the potential difference across it provided temp
    and other physical conditions are kept constant.
    (b) Two resistors R1 and R2 are connected in series to a 10V battery. The current flowing then is 0.5 A when R 1
    only is connected to the battery the current flowing is 0.8A. Calculate the
    (i) Value of R2

    V= IR
    10 = 0.5(R1+ R2)
    10 = 0.8R1
    R1 = 12.5
    10 = 0.5(12.5+ R2)
    R2= 20- 12.5= 7.5
    12.5 X 7.5
    (ii) = 4.688
    12.5+7.5

    10
    I= = 2.133 A
    4.688

    (iii) Measuring the level of liquid


    Measuring the density of the liquid
    (any one correct)
    (c)
    (i) A &G are brightest since they don’t share current
    C & D are dimmest since the current is split.
    (i)
    Bulbs A, E and G will light with the same brightness. C & d will also be off.
    16. a) Converging lens√, this is because the image formed is real√
    b) m=v/u√
    v=4u
    u+v=100√
    u+4u=100
    5u=100
    u=20cm
    v=80cm√
    1 1 1
    = +
    f u v
    1 1
    = +
    20 80
    5
    =
    80
    F=16cm
    (a) (i) Cause – Eye lens having a short focal length. Or - Eyeball being too long.
    Any one (1mk)
    (ii)

    Correct rays ✓¹
    d) i) The have a large field of view. √
    ii)
    Eye Camera
    Eye has a crystalline convex lens Camera has a convex lens
    Eye has retina where images are formed Camera has a light sensitive film where images
    are formed
    Iris controls the amount of light entering the The diaphragm controls the amount of light
    eye entering the camera.
    Choroid layer of the eye is black Camera box is painted black inside.

    17. (a).
    √1mark
    (ii) P is South Pole. √1mark
    (iii) Dipoles in the domain are aligned in the process of magnetisation. √1mark
    (iv) Steel retains magnetism than soft bar
    Steel will also take longer to be magnetized. √1mark

    (b) √1mark
    (ii) Increase the power of the electric motor. √1mark
    (c) (i)

    Each;
    √1mark

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