WAEC Physics 2025 Objective — Question 45
Question 45 of 51 from the West African Examinations Council (WAEC) Physics 2025 Objective paper, with the correct answer and a full explanation.
Advertisement
A bullet of mass 0.025kg moves at 250 ms⁻¹. Calculate its de Broglie wavelength. [h = 6.67×10⁻³⁴ Js]
- A. 6.67×10⁻³⁸ m
- B. 5.34×10⁻³⁵ m
- C. 1.07×10⁻³⁴ mCorrect
- D. 2.13×10⁻³⁴ m
Explanation
λ = h/(mv) = 6.67×10⁻³⁴/(0.025×250) = 6.67×10⁻³⁴/6.25 = 1.067×10⁻³⁴ m.
Advertisement
Sign up free to unlock
- Score tracking
- Practice history
- Saved questions
- Progress dashboard
- Personalized sessions
- Weak-topic breakdown
…and/or go further with premium services and No Ads.