JUPEB Physics
Past Questions
16+ verified Physics past questions for JUPEB. Step-by-step worked answers in 5 Nigerian languages.
Physics topics (2)
Sample Physics past questions
1. Speed of light in vacuum.
- A. 3 × 10⁵ m/s
- B. 3 × 10⁶ m/s
- C. 3 × 10⁸ m/s
- D. 3 × 10¹⁰ m/s
Answer: C
2. 1 J = 1 ?
- A. N
- B. N·m
- C. N·s
- D. kg
Answer: B
3. The SI unit of power is the:
- A. Joule
- B. Newton
- C. Watt
- D. Pascal
Answer: C
4. Acceleration due to gravity is approximately:
- A. 9.8 m/s²
- B. 98 m/s²
- C. 0.98 m/s²
- D. 980 m/s²
Answer: A
5. Sound cannot travel through:
- A. Solids
- B. Liquids
- C. Gases
- D. Vacuum
Answer: D
6. The unit of electric charge is the:
- A. Volt
- B. Ampere
- C. Coulomb
- D. Ohm
Answer: C
AI Explanation
## The reasoning Electric charge is a fundamental property of matter, like mass. Just as mass is measured in kilograms, **electric charge is measured in coulombs (C)**. Think of it this way: the coulomb is the "bucket" that holds charge. One coulomb represents approximately 6.24 × 10¹⁸ electrons worth of charge. This unit is named after French physicist Charles-Augustin de Coulomb. The relationship is simple: **Q = It**, where Q (charge in coulombs) = I (current in amperes) × t (time in seconds). So 1 coulomb = 1 ampere flowing for 1 second. ## Why the wrong options tempt you - **Volt** measures electric potential difference (how much "push" the charge has), not the charge itself - **Ampere** measures current (the *flow rate* of charge per second), not the amount of charge - **Ohm** measures resistance (opposition to current flow), totally different concept These all relate to electricity, so they sound plausible if you're rushing! ## Quick takeaway **Coulomb counts the charge; ampere counts how fast it flows; volt counts the push; ohm counts the resistance.** Remember: C for Charge = Coulomb!
7. Light year is a unit of:
- A. Time
- B. Distance
- C. Speed
- D. Brightness
Answer: B
8. The SI unit of work is the:
- A. Newton
- B. Joule
- C. Watt
- D. Pascal
Answer: B
AI Explanation
Work = force × distance; SI unit is joule (J) = N·m.
9. Newton's first law states that an object:
- A. Accelerates
- B. Remains at rest or in uniform motion unless acted upon by a net external force
- C. Always falls
- D. Always rotates
Answer: B
AI Explanation
Newton's first law (inertia): an object preserves its state of motion unless a net force acts on it.
10. What is the acceleration due to gravity at Earth's surface?
- A. ~5 m/s²
- B. ~9.8 m/s²
- C. ~15 m/s²
- D. ~20 m/s²
Answer: B
AI Explanation
g ≈ 9.8 m/s² (often approximated as 10 m/s² in calculations).
11. Frequency is measured in:
- A. Watts
- B. Hertz
- C. Newtons
- D. Joules
Answer: B
AI Explanation
Frequency = cycles per second. SI unit = hertz (Hz) = 1/s.
12. Sound is a:
- A. Transverse wave
- B. Longitudinal mechanical wave
- C. Electromagnetic wave
- D. Stationary wave only
Answer: B
AI Explanation
Sound is a longitudinal mechanical wave — particles oscillate in the direction of wave travel.
13. If a 10 Ω resistor carries 2 A, the voltage across it is:
- A. 5 V
- B. 12 V
- C. 20 V
- D. 0.2 V
Answer: C
AI Explanation
V = IR = 2 × 10 = 20 V.
14. Lenses that converge light are called:
- A. Concave
- B. Convex
- C. Plano
- D. Cylindrical
Answer: B
AI Explanation
Convex (converging) lenses focus parallel light to a point. Concave lenses diverge light.
15. Which colour has the highest frequency in visible light?
- A. Red
- B. Yellow
- C. Green
- D. Violet
Answer: D
AI Explanation
Violet has highest frequency / shortest wavelength in the visible spectrum. Red is the opposite extreme.
16. Kinetic energy =
- A. mv
- B. mgh
- C. ½ mv²
- D. Fd
Answer: C
AI Explanation
KE = ½ × mass × velocity² (energy of motion). mgh = potential energy due to height.
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