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WAEC EXAM RUNS
(PHYSICS PRACTICAL) 
NO 1 GRAPH BELOW

NO. 3 GRAPH BELOW
Physics – Practical – Answers
(1a)
TABULATE:
S/N: 1, 2 , 3, 4, 5
L(cm): 90.00, 80.00, 70.00, 60.00, 50.00
T(s): 38.00, 36.00, 34.00, 31.00, 28.00
T = t/20(sqt): 1.90, 1.80, 1.70, 1.55, 1.40
√L(cm^1/2): 9.49, 8.94, 8.37, 7.73, 7.07
(1aix)
Slope(s) = Δvertical/Δhorizontal
=1.90 – 1.55/9.49 – 7.75
= 0.35/1.74
S = 0.201
(1ax)
g = 4π²/S²
= 4 ×(3.142)²/(0.201)²
= 977.4cm/s²
(1axi)
(i) I ensured the angle of oscillation is relatively small.
(ii) I ensured that no external force is added to the system of oscillation.
(iii) I ensured the oscillation is perfect
3 )
Tabulate
s / n 1 , 2 , 3 , 4 , 5
D ( cm ) 25, 35 , 50, 65, 80
I ( A ) 1 . 99, 1 . 75, 1 . 55, 1 . 44, 1 . 36
I ^ ( A^ – 1 ) 0 . 530 , 0 . 571 , 0 . 645 , 0 . 694 , 0 . 735
Lo ( j ^) – 0 . 2984 , – 0 . 2434 , – 0 .
1904 , – 0 . 1586 , – 0 . 1337
*precautions:*
take any two
i ) I removed key when reading is not
taking
ii ) I ensured tight connections at the
terminals
iii ) I avoided parallax error when taking
reading from the ammeter.
3bii )
i ) length – longer wires have greater
resistance.
ii ) thickness – smaller diameter wires
have greater resistance
.
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