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JAMB UTME 2020

JAMB Physics 2020 past questions

7 objective questions from the 2020 JAMB Physics paper. Answer each one, then reveal the answer and explanation.

All JAMB Physics past questions

  1. Question 1

    Density

    An object of mass 600 g has a volume of 200 cm³. What is its density?

    1. Option A: 0.33 g/cm³
    2. Option B: 3 g/cm³
    3. Option C: 400 g/cm³
    4. Option D: 800 g/cm³
    Show the answer to question 1

    Answer: B, 3 g/cm³

    Density = mass ÷ volume = 600 ÷ 200 = 3 g/cm³.

  2. Question 2

    Heat

    How much heat is needed to raise the temperature of 0.2 kg of iron by 25 °C? (Specific heat capacity of iron = 460 J/kg K.)

    1. Option A: 1,150 J
    2. Option B: 92 J
    3. Option C: 2,300 J
    4. Option D: 11,500 J
    Show the answer to question 2

    Answer: C, 2,300 J

    Q = mcΔθ = 0.2 × 460 × 25 = 2,300 J.

  3. Question 3

    Work and energy

    Calculate the kinetic energy of a 6 kg body moving at 4 m/s.

    1. Option A: 96 J
    2. Option B: 48 J
    3. Option C: 12 J
    4. Option D: 24 J
    Show the answer to question 3

    Answer: B, 48 J

    KE = ½mv² = ½ × 6 × 4² = 48 J.

  4. Question 4

    Waves

    A wave of frequency 50 Hz has a wavelength of 0.5 m. Find its speed.

    1. Option A: 100 m/s
    2. Option B: 0.01 m/s
    3. Option C: 25 m/s
    4. Option D: 50 m/s
    Show the answer to question 4

    Answer: C, 25 m/s

    v = fλ = 50 × 0.5 = 25 m/s.

  5. Question 5

    Motion

    A car moving at 12 m/s accelerates uniformly at 4 m/s² for 3 s. Find its final velocity.

    1. Option A: 24 m/s
    2. Option B: 16 m/s
    3. Option C: 48 m/s
    4. Option D: 25 m/s
    Show the answer to question 5

    Answer: A, 24 m/s

    Use v = u + at = 12 + 4 × 3 = 24 m/s.

  6. Question 6

    Units and measurement

    What is the SI unit of inductance?

    1. Option A: Henry
    2. Option B: Farad
    3. Option C: Weber
    4. Option D: Tesla
    Show the answer to question 6

    Answer: A, Henry

    Inductance is measured in henries (H).

  7. Question 7

    Density

    A sample of mass 118.5 g occupies a volume of 15 cm³. Calculate its density.

    1. Option A: 7.9 g/cm³
    2. Option B: 0.13 g/cm³
    3. Option C: 79 g/cm³
    4. Option D: 3.95 g/cm³
    Show the answer to question 7

    Answer: A, 7.9 g/cm³

    Density = mass ÷ volume = 118.5 ÷ 15 = 7.9 g/cm³.

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