Confirmed Waec 2017 physics practical answers ready



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    ANSWER QUESTION 1 AND 3 ONLY
    ^ means raise to power. i : means
    that under i , u will get 1 , 2 , 3 , 4 , 5 . .
    =============================PHYSICS
    PRACTICAL======


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    3a)

    TABULATE

    x(cm):10,20,30,40,50,60

    V(v):0.65,0.75,1.00,1.20,1.45,1.55

    I(A):0.20,0.30,0.35,0.40,0.45,0.55

    LogV(v):-0.187,-0.125,0.000,0.079,0.161,0.190

    LogI(ohm):-0.699,-0.523,-0.456,-0.396,-0.391,-0.360

    SLOPE(s):= ( LogI2-LOgI1)/(LogV2-LogV1)
    =-0.2-(-0.7)/0.3-(-0.2)
    =0.5/0.5
    =1AV^-1



    3axi)
    i)ensured clean/tight terminals
    ii)open key when reading was taken

    3bi)
    i)brightness of the bulb increases
    ii)voltage/current through the bulb increases

    3bii)
    i)diode
    ii)transistor

    :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::

    (1)

    Tabulate
    i= L(cm)| |t1(s)| |t1(s)| |mean t(s)| |t(t/10)s| |logt
    (s)| |log Lcm| |Log T*10^-2|(s)| |Log
    L*10^-2(cm)

    1= |80.00| |17.87| |17.56| |17.715|
    |17.715| |0.2483| |1.9031| |24.83|
    |19.031|

    2= |7000 1622 1646 16340 16340 02133 18457
    2133 18451

    3= |6000 1609 1509 15590 15590 01928 17782
    1928 17782

    4= |5000 1408 1477 14425 14425 01591 16990

    5= |4000 1328 1336 13320 13320 01212
    1591 16990 1212 16021

    slope (s) Log T2*10^-2/Log T2*10^-1 - Log
    T2*10^-2/Log T2*10^-1 =
    (21.33-12.12(s))*10^-2/
    (18.50-16.02(cm)*10^-1)
    =3.714*10^-1
    =0.3714cm^-1



    1axi)
    i)ensured supports of pendula were rigged
    ii)avoided parallax error on meter rule/stop
    watch

    1bi)
    simple harmonic motion is the motion of a body
    whose acceleration is always direct towards a
    fixed point and is proportional to the
    displacement from the fixed points

    1bii)
    T=1.2secs
    Log 1.2=0.079
    0079 shown on graph with corresponding Log L
    read L correctly determined


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  • doktoh bash: Friday, 31 March 2017 at March 31, 2017 (edit)
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