MPESB Group · Bite-size lessons
General Science
About 5 min · General Knowledge · English
Time worked out from the lesson's 227 words at 150 words a minute, plus a minute for each question.
General Science covers fundamental concepts from Physics, Chemistry, and Biology that form the backbone of scientific literacy expected from government employees. In MPESB exams, this section typically tests basic principles, everyday applications, and awareness of scientific phenomena rather than complex calculations.
Key ideas
- Newton's Three Laws: Inertia (1st), F = ma (2nd), Action-Reaction (3rd) — explain all mechanical motion.
- Work, Energy, Power: Work = Force × Distance; Energy is capacity to do work; Power = Work/Time (unit: Watt).
- Light behavior: Reflection (mirrors), Refraction (lenses); convex lens converges light, concave lens diverges it.
- Sound: Needs a medium to travel; speed in air ≈ 343 m/s; ultrasound (>20,000 Hz) used in medical imaging.
- Electricity: Current = Charge/Time; Ohm's Law: V = IR; conductors allow current, insulators resist it.
Quick reference
- SI unit of force: Newton; Energy: Joule; Power: Watt; Current: Ampere
- pH of pure water: 7 (neutral)
- Photosynthesis equation: CO₂ + H₂O + Light → Glucose + O₂
- Universal blood donor: O negative; Universal recipient: AB positive
- Speed of light: 3 × 10⁸ m/s; Speed of sound in air: ~343 m/s
Check yourself: 3 questions
1. Which vitamin is essential for blood clotting in the human body?
2. What is the SI unit of electric current?
3. Which of the following processes involves the conversion of sugar into alcohol and carbon dioxide by yeast?
This lesson is cut from the topic's note, not rewritten. Fact-checked on 17 Oct 2026: an AI-assisted check of this note against cited sources; the errors it found were corrected that day. Some errors may remain. The questions are from Shishya's validated question bank.
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