JAMB Physics past questions and answers

1. Question 1

   JAMB 2024Waves

   A wave of frequency 250 Hz has a wavelength of 0.25 m. Find its speed.

   1. AOption A: 1000 m/s
   2. BOption B: 62.5 m/s
   3. COption C: 0.001 m/s
   4. DOption D: 125 m/s
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   Answer: B, 62.5 m/s

   v = fλ = 250 × 0.25 = 62.5 m/s.

2. Question 2

   JAMB 2024Density

   A sample of mass 395.5 g occupies a volume of 35 cm³. Calculate its density.

   1. AOption A: 0.09 g/cm³
   2. BOption B: 113 g/cm³
   3. COption C: 11.3 g/cm³
   4. DOption D: 5.65 g/cm³
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   Answer: C, 11.3 g/cm³

   Density = mass ÷ volume = 395.5 ÷ 35 = 11.3 g/cm³.

3. Question 3

   JAMB 2024Current electricity

   A potential difference of 3.5 V is applied across a 7 Ω resistor. Find the current that flows.

   1. AOption A: 24.5 A
   2. BOption B: 2 A
   3. COption C: 1 A
   4. DOption D: 0.5 A
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   Answer: D, 0.5 A

   By Ohm's law, I = V ÷ R = 3.5 ÷ 7 = 0.5 A.

4. Question 4

   JAMB 2024Pressure

   A force of 300 N acts on an area of 2 m². Find the pressure exerted.

   1. AOption A: 150 Pa
   2. BOption B: 600 Pa
   3. COption C: 75 Pa
   4. DOption D: 300 Pa
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   Answer: A, 150 Pa

   Pressure = force ÷ area = 300 ÷ 2 = 150 Pa.

5. Question 5

   JAMB 2024Units and measurement

   What is the SI unit of force?

   1. AOption A: Joule
   2. BOption B: Watt
   3. COption C: Newton
   4. DOption D: Pascal
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   Answer: C, Newton

   Force is measured in newtons (N).

6. Question 6

   JAMB 2023Density

   A sample of mass 267 g occupies a volume of 30 cm³. Calculate its density.

   1. AOption A: 0.11 g/cm³
   2. BOption B: 89 g/cm³
   3. COption C: 8.9 g/cm³
   4. DOption D: 4.45 g/cm³
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   Answer: C, 8.9 g/cm³

   Density = mass ÷ volume = 267 ÷ 30 = 8.9 g/cm³.

7. Question 7

   JAMB 2023Current electricity

   A potential difference of 10 V is applied across a 5 Ω resistor. Find the current that flows.

   1. AOption A: 2 A
   2. BOption B: 50 A
   3. COption C: 0.5 A
   4. DOption D: 4 A
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   Answer: A, 2 A

   By Ohm's law, I = V ÷ R = 10 ÷ 5 = 2 A.

8. Question 8

   JAMB 2023Heat

   How much heat is needed to raise the temperature of 0.4 kg of aluminium by 10 °C? (Specific heat capacity of aluminium = 900 J/kg K.)

   1. AOption A: 1,800 J
   2. BOption B: 360 J
   3. COption C: 3,600 J
   4. DOption D: 9,000 J
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   Answer: C, 3,600 J

   Q = mcΔθ = 0.4 × 900 × 10 = 3,600 J.

9. Question 9

   JAMB 2023Waves

   A wave of frequency 200 Hz has a wavelength of 4 m. Find its speed.

   1. AOption A: 50 m/s
   2. BOption B: 0.02 m/s
   3. COption C: 1600 m/s
   4. DOption D: 800 m/s
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   Answer: D, 800 m/s

   v = fλ = 200 × 4 = 800 m/s.

10. Question 10

    JAMB 2023Pressure

    A force of 200 N acts on an area of 0.5 m². Find the pressure exerted.

    1. AOption A: 100 Pa
    2. BOption B: 200 Pa
    3. COption C: 400 Pa
    4. DOption D: 800 Pa
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    Answer: C, 400 Pa

    Pressure = force ÷ area = 200 ÷ 0.5 = 400 Pa.

More Physics: WAEC Physics past questions.