Waec 2020 physics Practical Alternative A Questions and Answers is Now available
- Physics 3 (Practical) (Alternative A) – 09:30 a.m. – 12:15 p.m. (1st Set)
- Physics 3 (Practical) (Alternative A) – 12:40 p.m – 3:25p.m. (2nd Set)
To get real physics Practical Questions and answers 2020
(1xii)
(i) I avoid parallax error in the metre rule and stop
(ii) I avoid conical oscillation
(3a)
(i) Emf , F=3.00v
Tabulate
R(π) : 2.0,5.0,10.0,12.0,15.0,20.0
V(v): 0.86,0.62,0.43,0.38,0.32,0.25
V^-1(v^-1): 1.1628,1.6129,2.3256,2.6316,3.1280,4
(3ix)
Slope (s) =ΔR/Δv^-1
= 17.5-4.25/3.5-1.5
= 13.25/2
= 6.625
Intercept (c) = -5.75
(3x)
S=Ro alpha (please use the alpha sign)
6.625=0.85(alpha)
alpha = 6.625/0.85=7.79
C= -(Ro +β)
-5.75= - (0.85+β)
β= 5.75-0.85
β=4.9
(3)
(3x)
(i) I avoided parallax error when taking readings from the
voltmeter
(ii) I ensured that the key was opened when reading is not
been taking
