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2021 NECO PHYSICS-PRACTICAL

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*Question 1*

(i)i avoided draught.
(ii)i avoided error due to parallax when reading the meter rule.
(iii) I ensured steady oscillation.
(iv) I avoided zero error to the stop clock.
=====================================

*Question 3*

(i)I ensured tightened connections.
(ii) I avoided error due to parallax on the ammeter.
(iii) I removed key when reading was not taken
(iv) Avoidance of repeated reading from table
====================================

CHOOSE ANY PERFECT TWO PRECAUTIONS FROM EACH

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Updated: July 12, 2021 — 6:08 am

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  1. _2021 NECO PHYSICS-PRACTICAL_

    (1)

    Tabulate

    reading- 1,2,3,4,5

    masses(m)- 50,53,55,58,60
    depth(d)-5.50,5.80.6.00,6.30,6.60
    ti(s)- 6.45,6.80,6.85,7.40,7.45
    T=t/n(s)- 0.655,0.680,0.685,0.740,0.758
    T^2(s^2)- 0.429,0.462,0.469,0.548,0.575
    Li(g/cm)- 5.455,5.776,5.833,6.032,6.154
    Mli(g)-30.0,33.5,35.0,38.0,40.0

    1aix)
    i)I avoided parallax error in reading clock/weight balance
    ii)I ensue repeated readings are taken to avoid random error

    1bi)
    i)weight
    ii)upthrust
    iii)viscous force/drag or liquid friction

    1bii)
    The amplitude of oscillation of the loaded test tube decreases with time because of the viscous drag(force) which opposes the motion.

    (1xii)
    (i)i avoided draught.
    (ii)i avoided error due to parallax when reading the meter rule.
    (iii) I ensured steady oscillation.
    (iv) I avoided zero error to the stop clock.
    =====================================

    3)

    Table W1
    s/n-1,2,3,4,5,6
    xn(cm)/d1=0.009m- 3.06,3.50,3.70,4.30,4.50,4.80
    xm(cm)converted/- 15.30,16.50,18.50,21.50,22.50,24.40
    xm(cm)converted d2=0.005m- 84.70,83.50,81.50,78.50,77.50,75.60
    Ri(n)- 11.07,10.12,8.81,7.30,6.89,620

    Tabulate W2
    s/n-1,2,3,4,5,6
    xmi(cm)- 1.40,1.65,1.80,2.20,2.55,2.94
    converted/xmi(cm)7.00,8.25,9.00,11.00,12.75,14.70
    xni(cm)- 93.00,91.75,91.00,89.00,87.25,85.3
    R2i(n)- 26.57,22.24,20.22,16.18,13.69,11.61
    slope
    dy/dx=26.57-13.69/11.07-6.89
    =12.88/4.18
    =3.08

    3ix)
    k=d2/d1*squareroot5
    =0.005/0.009*squareroot13.08
    =0.56*1.75
    =0.98

    3x)
    i)i would ensure that the terminal are well tightened to avoid partial contact
    ii)i would obey the conect connection of positive to positive to negetive to negetive when connecting to circuit

    3bi)
    when temperature increases the molecules tends to vibrate more intense there by opposing the flow of current

    3bii)
    P=I^R
    P=V^2/R
    power=1000W
    Voltage=200V
    R=?
    1000=200^2/R
    R=40000/1000
    R=40

    (3xi)
    (i)I ensured tightened connections.
    (ii) I avoided error due to parallax on the ammeter.
    (iii) I removed key when reading was not taken
    (iv) Avoidance of repeated reading from table
    ====================================

    _CHOOSE ANY PERFECT TWO FROM EACH_

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