Neco 2021 June/July Physics Practical Answers

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Neco 2021 June/July Physics Practical Answers
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    ""NECO JUNE/JULY 2021 PHYSICS PRACTICAL""



    PHYSICS-PRACTICAL
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    ==
    (1)
    M/g; 50.0|70.0|90.0|110.0|130.0|

    t,/s; 5.10|9.10|10.30|12.20|13.70|

    t(s); 0.255•0.455|0.515|0.610|0.685|

    T²(s²)0.065|0.207|0.265|0.372|0.469|

    (1ix)
    Graph.


    (1x)
    Slope; s DM/DT²
    =178-50/0.7-0.07
    =128/0.63
    =203.1746
    =203.17g|s²

    (1xii)
    (i)i avoided drought by closing the window
    (ii)i avoided error due to parallax when reading the meter rule

    (1bi)
    Tabulate.
    -Period-
    (i)is the time taken on complete one oscillation/circle or to.
    (ii)unit is second (s)
    (iii)it is Oscillation motion
    (iv)it is when a body moves in a to and fro manner

    -Frequency of oscillation-
    (i)is the number of complete oscillation in one second
    (ii) frequency; unit Hertz (Hz)
    (iii)it is Rotation motion
    (iv)it is when a body turns about an axis through the body

    (1bii)
    E= 25J
    Extension= 6.7x10-²m
    Force constant (k) = ?
    E= 1/2ke²
    2E = ke²
    k = 2E/e²
    k = 2x 25/(0.067)²
    k = 50/0.00449
    k = 11135.9Nm-¹
    =====================================

    (3)
    Tabulate
    R(n); 2.0|4.0|6.0|8.0|1.0|

    I(A); 0.80|0.64|0.46|0.36|

    I^-¹(A^-¹)1.2500|1.5625|2.1739|2.7778|3.3333

    (3viii)
    Slope s= DI^-²/DR
    =3-1/9-2=2/7=0.2857

    (3ix)
    Intercept C : 0.40

    (3x)
    K=c/5-2=0.40^²/0.2857=1.4-2=0.6

    (3)
    Graph.


    (3xi)
    (i)I ensured tight connections
    (ii) I avoided error due to parallax on the ammeter

    (3bi)
    (i)Free electrons
    (ii)Protons and Electron
    (iii)Electrons and ions

    (3bii)
    I=E/R+r
    I=2*2/4+1=4/5=0.8A

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    (1xii)
    (i)i avoided drought by closing the window
    (ii)i avoided error due to parallax when reading the meter rule

    (1bi)
    Tabulate.
    -Period-
    (i)is the time taken on complete one oscillation/circle or to.
    (ii)unit is second (s)
    (iii)it is Oscillation motion
    (iv)it is when a body moves in a to and fro manner

    -Frequency of oscillation-
    (i)is the number of complete oscillation in one second
    (ii) frequency; unit Hertz (Hz)
    (iii)it is Rotation motion
    (iv)it is when a body turns about an axis through the body

    (1bii)
    E= 25J
    Extension= 6.7x10-²m
    Force constant (k) = ?
    E= 1/2ke²
    2E = ke²
    k = 2E/e²
    k = 2x 25/(0.067)²
    k = 50/0.00449
    k = 11135.9Nm-¹
    =====================================


    (3xi)
    (i)I ensured tight connections
    (ii) I avoided error due to parallax on the ammeter
    (3bi)
    (i)Free electrons
    (ii)Protons and Electron
    (iii)Electrons and ions
    ======================

    2bi) A real image is formed outside the system, where the emerging rays actually cross; such an image can be caught on a screen or piece of film and is the kind of image formed by a slide projector or in a camera.

    The image developed by a plane mirror is virtual and laterally inverted.

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    NUMBER 2



















































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