MH Police Bharti · Bite-size lessons
General Science
About 6 min · General Knowledge & Current Affairs · English
Time worked out from the lesson's 304 words at 150 words a minute, plus a minute for each question.
General Science is part of the Maharashtra Police Bharti exam, and questions are typically fact-based and straightforward. The syllabus covers fundamental concepts from Physics, Chemistry, and Biology that you encountered in school (Classes 6–10 level). Examiners test whether you understand everyday scientific phenomena — why the sky is blue, how vaccines work, what makes iron rust.
Key ideas
- Newton's Laws of Motion: First law (inertia), second law (F = ma), third law (action-reaction). Every motion question traces back here.
- Work, Energy, Power: Work = Force × Distance. Energy cannot be created or destroyed, only transformed. Power = Work / Time.
- Light: Travels in straight lines, reflects (mirror), refracts (lens). White light splits into VIBGYOR via a prism.
- Sound: Needs a medium; cannot travel in vacuum. Speed in air ≈ 343 m/s. Echoes need minimum 17 m distance.
- Electricity: Current (I) = Charge / Time. Ohm's Law: V = I × R. Series vs parallel circuits.
Watch out for
- Confusing mass and weight
- Mixing up arteries and veins
- Believing sound travels in vacuum
Quick reference
- Newton's 3rd Law: Every action has an equal and opposite reaction.
- Ohm's Law: V = I × R (Voltage = Current × Resistance).
- Photosynthesis occurs in: Chloroplast (green pigment = chlorophyll).
- RBC lifespan: ~120 days; produced in bone marrow.
- Acid + Base → Salt + Water (neutralisation reaction).
Check yourself: 3 questions
1. Which of the following vitamins is essential for blood clotting in the human body?
2. A ball is thrown vertically upward. At the highest point of its motion, which of the following statements is correct?
3. Which of the following elements is a liquid at room temperature (25°C)?
This lesson is cut from the topic's note, not rewritten. Fact-checked on 21 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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