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JAMB 2025 Likely Physics Questions and Answers
Below is a compilation of likely Physics questions and answers for the 2025 Joint Admissions and Matriculation Board (JAMB) examination. These questions are based on past JAMB trends, the official syllabus, and frequently tested topics.
Section A: Mechanics
1. A car accelerates uniformly from rest at 3 m/s² for 10 seconds. What is its final velocity?
Answer:
Using , where:
- (initial velocity),
- ,
- .
.
2. What is the work done when a force of 20 N moves an object 5 m in the direction of the force?
Answer:
Work done .
3. A stone is projected vertically upwards with a velocity of 20 m/s. What is the maximum height reached? (g = 10 m/s²)
Answer:
Using , at maximum height, .
.
4. Which of the following is a scalar quantity? (a) Force (b) Velocity (c) Energy (d) Acceleration
Answer:
(c) Energy – Scalars have magnitude only (no direction).
Section B: Waves & Optics
5. The distance between two consecutive crests of a wave is 4 m. If the wave speed is 20 m/s, what is its frequency?
Answer:
Wavelength , wave speed .
Using ,
.
6. Which phenomenon explains why a pencil appears bent when placed in water?
Answer:
Refraction – Light changes speed when moving between media of different densities.
7. In a concave mirror, if an object is placed between the focus and the pole, the image formed is:
Answer:
Virtual, erect, and magnified.
Section C: Electricity & Magnetism
8. Three resistors (2 Ω, 3 Ω, and 5 Ω) are connected in series. What is the total resistance?
Answer:
Total resistance .
9. A current of 2 A flows through a 10 Ω resistor for 5 minutes. How much heat is produced?
Answer:
Heat energy , where .
.
10. What is the direction of the magnetic field around a straight current-carrying conductor?
Answer:
Concentric circles (determined by the right-hand grip rule).
Section D: Thermodynamics
11. The volume of a fixed mass of gas is doubled while its temperature remains constant. What happens to its pressure?
Answer:
Pressure is halved (Boyle’s Law: ).
12. Which of the following is NOT a mode of heat transfer? (a) Conduction (b) Convection (c) Radiation (d) Reflection
Answer:
(d) Reflection – Reflection is a property of light, not heat transfer.
Section E: Modern Physics
13. What is the energy of a photon with a frequency of ? (h = )
Answer:
Energy .
14. In a nuclear reaction, what is conserved? (a) Mass only (b) Energy only (c) Both mass and energy (d) Neither mass nor energy
Answer:
(c) Both mass and energy (Einstein’s mass-energy equivalence).
Section F: Practical Physics
15. In a simple pendulum experiment, which factor does NOT affect the period? (a) Length of string (b) Mass of bob (c) Acceleration due to gravity (d) Amplitude (for small angles)
Answer:
(b) Mass of bob – The period is independent of mass.
16. What is the reading on the vernier caliper below?
(Assume main scale = 2.3 cm, vernier scale coincidence = 7)
Answer:
Reading = Main scale + (Vernier scale × Least count)
= 2.3 cm + (7 × 0.01 cm) = 2.37 cm.
Conclusion
These JAMB 2025 likely Physics questions cover key topics from the syllabus. To excel:
✔ Master calculations (equations of motion, Ohm’s Law).
✔ Understand wave and optics principles (reflection, refraction).
✔ Revise past JAMB questions for patterns.
Best of luck in your JAMB 2025 Physics exam! 🚀
