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WAEC WASSCE 2023

WAEC Physics 2023 past questions

5 objective questions from the 2023 WAEC Physics paper. Answer each one, then reveal the answer and explanation.

All WAEC Physics past questions

  1. Question 1

    Waves

    A wave of frequency 550 Hz has a wavelength of 0.4 m. Find its speed.

    1. Option A: 1375 m/s
    2. Option B: 0.0007 m/s
    3. Option C: 220 m/s
    4. Option D: 440 m/s
    Show the answer to question 1

    Answer: C, 220 m/s

    v = fλ = 550 × 0.4 = 220 m/s.

  2. Question 2

    Current electricity

    A potential difference of 95 V is applied across a 19 Ω resistor. Find the current that flows.

    1. Option A: 1805 A
    2. Option B: 0.2 A
    3. Option C: 10 A
    4. Option D: 5 A
    Show the answer to question 2

    Answer: D, 5 A

    By Ohm's law, I = V ÷ R = 95 ÷ 19 = 5 A.

  3. Question 3

    Pressure

    A force of 900 N acts on an area of 2.5 m². Find the pressure exerted.

    1. Option A: 360 Pa
    2. Option B: 2,250 Pa
    3. Option C: 180 Pa
    4. Option D: 720 Pa
    Show the answer to question 3

    Answer: A, 360 Pa

    Pressure = force ÷ area = 900 ÷ 2.5 = 360 Pa.

  4. Question 4

    Density

    A sample of mass 468 g occupies a volume of 65 cm³. Calculate its density.

    1. Option A: 0.14 g/cm³
    2. Option B: 72 g/cm³
    3. Option C: 3.6 g/cm³
    4. Option D: 7.2 g/cm³
    Show the answer to question 4

    Answer: D, 7.2 g/cm³

    Density = mass ÷ volume = 468 ÷ 65 = 7.2 g/cm³.

  5. Question 5

    Heat

    How much heat is needed to raise the temperature of 0.6 kg of copper by 15 °C? (Specific heat capacity of copper = 400 J/kg K.)

    1. Option A: 1,800 J
    2. Option B: 240 J
    3. Option C: 3,600 J
    4. Option D: 6,000 J
    Show the answer to question 5

    Answer: C, 3,600 J

    Q = mcΔθ = 0.6 × 400 × 15 = 3,600 J.

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