Neco 2015/2016 Physics Practical Answers and Questions Now Availabe

    COMPLETED NECO PHYSICS PRATICAL
    ANSWERS

    1a) Number of oscillation = 10
    {NOTE: this sign ^ means Raise to
    power.)
    S/N | L(cm) | T(s) | T=t/10(s) | T^2(s)
    ^2 | L(cm)^3
    1. | 90.00 | 4.70 | 0.470 | 0.2209 |
    729000
    2. | 85.00 | 4.50 | 0.450 | 0.2025 |
    614125
    3. | 80.00 | 4.30 | 0.430 | 0.1849 |
    512000
    4. | 75.00 | 4.00 | 0.400 | 0.1600 |
    421875
    5. | 70.00 | 3.80 | 0.380 | 0.1444 |
    343000
    (Ix) Slope(s),= 720,000 - 200,000/ 0.225
    - 0.11
    S= 520000/0.115
    S= 4521739.13cm^3/s^2
    (X) PRECAUTIONS
    (I) I made sure rigid support of the
    apparatus
    (ii) I avoided error due to parallax
    when reading my stopwatch
    (iii) I made sure I oscillate at small
    angle
    (Iv) I minimized draught
    (1bi) The mas M series as an oscillator
    (1bii)
    (I) Simple pendulum bob
    (ii) Loaded test tube
    (iii) Loaded spiral spring
    (Iv) Skin of talking drum
    (V) Helical spring

    (3a) E.M.F (E) = 3.00v , Io = 0.62A
    S/N | PJ=L(cm) | I(A) | y=E/A(v/A) |
    1. | 20.00 | 0.58 | 5.172 |
    2. | 30.00 | 0.50 | 6.000 |
    3. | 40.00 | 0.45 | 6.667 |
    4. | 50.00 | 0.40 | 7.500 |
    5. | 60.00 | 0.35 | 8.571 |
    6. | 70.00 | 0.32 | 9.375 |
    (Vii) Slope(s)= Y2 - Y1 / L2 - L1
    S = 10.20 - 4.00/ 80 - 7
    S = 6.20/73
    S= 0.0849v/A
    The intercept C on the vertical axis =
    2.70v/A
    (Viii) K = Io C
    K = 0.62 x 2.70
    K = 1.674
    (Ix)PRECAUTIONS
    (I) I ensured hight connection of the
    wire of all the instrument use
    (ii) I maintained steady flow of
    current before taking my reading
    (iii) I made sure that I removed the
    key after each reading to avoid
    drained of the cell
    (Iv) I avoided error due to parallax on
    ammeter
    (V) I made sure that the jockey is not
    dragged on the wire of the
    potentiometer

    (3bi)The key K. This is because the
    key serves a switch which does not
    drawn any current or voltage from
    the source of E.M.F

    (3b) From the defination of Resistivity
    P = RA/ L
    But A = pai D^2/ 4
    P = R pai D^2/4L
    P4L = pai R D^2
    L = pai R D^2/ 4P
    Where P is the resitivity of the
    material.
    =====COMPLETED=====

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