Physics Quiz
Forces, energy, light, electricity and the scientists behind the laws of nature.
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About the Physics Quiz
Physics explains how everything from falling apples to distant galaxies behaves. This quiz covers Newton’s laws, light and sound, electricity, units of measurement and the breakthroughs of Einstein and other great physicists.
This quiz has 20 questions, served in rounds of 10 with a fresh mix and shuffled answers every time you play. Every answer comes with a short explanation.
Sample Physics Questions & Answers
Q1. What is the SI unit of force?
✅ Answer: Newton
💡 One newton is the force that accelerates one kilogram by one metre per second squared.
Q2. Approximately how fast does light travel in a vacuum?
✅ Answer: 300,000 km per second
💡 Light travels at about 299,792 km per second.
Q3. Who proposed the theory of general relativity?
✅ Answer: Albert Einstein
💡 Einstein published general relativity in 1915, describing gravity as the curvature of spacetime.
Q4. Which of Newton’s laws states that every action has an equal and opposite reaction?
✅ Answer: Third law
💡 The third law explains how rockets push themselves forward.
Q5. What is the SI unit of electrical resistance?
✅ Answer: Ohm
💡 The ohm is named after German physicist Georg Ohm.