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# WAEC Physics Practical Questions And Answers 2023

Find below WAEC Physics Practical questions and Answers 2023.

PHYSICS PRACTICAL 2023 SPECIMENS

QUESTION 1

• A load of mass 100g concealed and labelled as P
• A load of mass 20g concealed and labelled as Q
• A set of masses m (40g, 50g, 60g, 70g and 80g)
• Metre rule
• 100cm piece of string
• Stop watch
• Helical spring
• Retort stand set-up
• Knife edge

QUESTION 2

• A rectangular block (glass or Perspex) measuring at least 10cm×9cm
• Drawing sheet
• Drawing board
• Four optical pins
• Drawing pins
• Triangular prism
• Half metre rule
• Plane mirror

QUESTION 3

• 1Ω standard resistor labelled R
• Rheostat
• Voltmeter
• Ammeter
• Key/switch
• Source of emf, E=2F
• Ten connecting wires
• Resistance box
• Jockey
• Metre bridge

1bi)
Firstly, the net force acting upon the object must be zero. Secondly, the net torque acting upon the object must also be zero.

1bii)
Let F1 = 4N and F2 = 3N.
Resultant force (R) = √(F1^2 + F2^2)
= √((4N)^2 + (3N)^2)
= √(16N^2 + 9N^2)
= √(25N^2)
= 5N

(2bi)
If the angle of incidence (θ₁) is greater than the critical angle (θ_c), then total internal reflection occurs.

(2bii) Snell’s law states that the ratio of the sine of the angle of incidence (θ₁) to the sine of the angle of refraction (θ₂) is equal to the ratio of the velocities of light in the two media, which is also equal to the inverse ratio of their refractive indices.

(1axi)
(Pick 2)
(i)I avoid parallax error by placing my eyes vertically on the meter rule when taking my readings.
(ii)I avoid drought.
(iii)I avoid Zero error by making necessary adjustment to the meter rule before starting my practicals..
(1)
Graph!!!!

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(3)

(3)
Graph!!!