Practice: Science Numericals and MCQs (with Answers)

Questions

1. V = 12 V, R = 4 Ω. Find I.
2. I = 3 A, R = 5 Ω. Find V.
3. V = 20 V, I = 4 A. Find R.
4. Force = 20 N on a 4 kg body. Find acceleration.
5. Mass 5 kg, acceleration 2 m/s². Find force.
6. Which mirror is used in vehicle side mirrors?
7. Unit of resistance?
8. pH of pure water?
9. Two 2 Ω resistors in series — total resistance?
10. Gas released during photosynthesis?

Answer key

1) 3 A   2) 15 V   3) 5 Ω   4) 5 m/s²   5) 10 N   6) Convex   7) ohm (Ω)   8) 7   9) 4 Ω   10) Oxygen