Ads

Important Science Topics for WBP SI Exam Preparation

Mrinal মার্চ ১৭, ২০২৫

Important Science Topics for WBP SI Exam Preparation





For the WBP SI (West Bengal Police Sub-Inspector) Exam, the Science section requires focused preparation. Below are the key science topics categorized by subject:

Physics

1. Motion & Laws of Motion

  • Speed, Velocity, and Acceleration
  • Newton’s Laws of Motion (1st, 2nd, and 3rd Law)
  • Equations of Motion:
v=u+atv = u + at s=ut+12at2s = ut + \frac{1}{2}at^2 v2=u2+2asv^2 = u^2 + 2as

2. Work, Energy, and Power

  • Work = Force × Displacement
  • Kinetic Energy & Potential Energy
  • Power = Work/Time

3. Gravitation & Fluid Mechanics

  • Law of Gravitation
  • Archimedes’ Principle
  • Pascal’s Law

4. Sound

  • Types of Waves (Transverse & Longitudinal)
  • Properties of Sound Waves (Frequency, Amplitude)
  • Doppler Effect

5. Light & Optics

  • Reflection & Refraction
  • Mirror & Lens Formula:
1f=1u+1v\frac{1}{f} = \frac{1}{u} + \frac{1}{v}

6. Heat & Thermodynamics

  • Temperature Conversion (°C ↔️ °F ↔️ K)
  • Heat Transfer Methods (Conduction, Convection, Radiation)

7. Magnetism & Electricity

  • Ohm’s Law: V=IRV = IR
  • Electrical Power: P=VIP = VI
  • Electric Circuit Diagrams

Chemistry

1. Matter and Its States

  • Solid, Liquid, and Gas
  • Melting Point, Boiling Point

2. Atomic Structure

  • Structure of Atom (Protons, Neutrons, Electrons)
  • Ions and Compounds

3. Periodic Table

  • Important Elements and Their Properties
  • Metals, Non-Metals, and Metalloids

4. Chemical Reactions

  • Balancing Equations
  • Oxidation & Reduction

5. Acids, Bases, and Salts

  • pH Scale and Its Importance
  • Common Household Chemicals (Vinegar, Baking Soda)

6. Environmental Chemistry

  • Pollution and Its Control
  • Greenhouse Effect & Ozone Layer Depletion

Biology

1. Human Anatomy & Physiology

  • Digestive System
  • Respiratory System
  • Circulatory System
  • Nervous System & Endocrine System

2. Diseases & Prevention

  • Common Diseases (Typhoid, Malaria, Dengue)
  • Vaccines and Their Importance

3. Plant Physiology

  • Photosynthesis
  • Plant Reproduction

4. Food & Nutrition

  • Vitamins and Their Deficiencies
  • Importance of Carbohydrates, Proteins, and Fats

Environmental Science

  • Ecosystem and Biodiversity
  • Conservation of Natural Resources
  • Air, Water, and Soil Pollution
  • Renewable Energy Sources

General Science in Daily Life

  • Scientific Instruments (Microscope, Barometer, Thermometer)
  • Important Scientists and Their Contributions
  • Science in Everyday Applications




WBP SI Exam - Physics Detailed Notes, Important Formulas & Questions

1. Motion & Laws of Motion

Key Concepts:

  • Speed (v): Distance covered per unit time.

    Formula:

  • Velocity (v): Displacement per unit time (includes direction).

  • Acceleration (a): Rate of change of velocity.

    Formula:

  • Equations of Motion:

Sample Question:

Q. A car starts from rest and accelerates at 2 m/s² for 5 seconds. Find its final velocity. Solution: Using

2. Work, Energy & Power

Key Concepts:

  • Work (W): Product of force and displacement in the direction of force.
    Formula:

  • Kinetic Energy (KE): Energy possessed by a moving object.
    Formula:

  • Potential Energy (PE): Energy possessed due to position.
    Formula:

  • Power (P): Rate of doing work.
    Formula:

Sample Question:

Q. Find the work done when a 10 N force moves an object 5 meters in the same direction.
Solution:

3. Gravitation & Fluid Mechanics

Key Concepts:

  • Newton's Law of Gravitation:

  • Archimedes' Principle: Buoyant force = Weight of displaced liquid.

Sample Question:

Q. What is the force of gravity acting between two 5 kg masses placed 2 m apart? (G = ) Solution:

4. Light & Optics

Key Concepts:

  • Reflection: Angle of incidence = Angle of reflection.

  • Refraction: Bending of light while passing through different mediums.

  • Mirror Formula:

Sample Question:

Q. An object is placed 20 cm in front of a concave mirror with focal length 10 cm. Find the image distance. Solution: Using

5. Heat & Thermodynamics

Key Concepts:

  • Heat Energy (Q):

  • Conduction, Convection, Radiation principles.

Sample Question:

Q. How much heat energy is required to raise the temperature of 2 kg of water from 30°C to 60°C? (Specific heat of water = 4200 J/kg°C) Solution:

6. Electricity & Magnetism

Key Concepts:

  • Ohm’s Law:

  • Electrical Power:

  • Magnetic Field & Magnetic Force

Sample Question:

Q. Find the current flowing through a 100Ω resistor connected to a 200V battery. Solution: Using


WBP SI Exam - Chemistry Detailed Notes, Important Formulas & Questions

1. Matter and Its States

Key Concepts:

  • Solid: Fixed shape & volume; tightly packed molecules.

  • Liquid: No fixed shape, fixed volume; molecules are loosely packed.

  • Gas: No fixed shape or volume; molecules are freely moving.

Important Terms:

  • Melting Point: Temperature at which a solid turns into liquid.

  • Boiling Point: Temperature at which a liquid turns into gas.

  • Sublimation: Direct conversion of solid to gas (e.g., camphor, dry ice).

2. Atomic Structure

Key Concepts:

  • Proton (+), Neutron (0), Electron (-)

  • Atomic Number (Z): Number of protons in an atom.

  • Mass Number (A): Sum of protons and neutrons.

Example:

Carbon (C): Atomic Number = 6, Mass Number = 12

Isotopes & Isobars:

  • Isotopes: Same atomic number, different mass numbers (e.g., Hydrogen isotopes - Protium, Deuterium, Tritium).

  • Isobars: Different elements with the same mass number (e.g., Calcium-40 & Argon-40).

3. Periodic Table

Key Concepts:

  • Groups: Vertical columns (18 groups in total).

  • Periods: Horizontal rows (7 periods in total).

  • Metals, Non-metals & Metalloids: Key element types.

Trends in Periodic Table:

  • Atomic size decreases from left to right.

  • Ionization energy and electronegativity increase across a period.

4. Chemical Reactions & Equations

Key Concepts:

  • Combination Reaction: Two or more substances combine to form a new compound.

  • Decomposition Reaction: A compound breaks into simpler substances.

  • Displacement Reaction: One element replaces another in a compound.

  • Redox Reaction: Simultaneous oxidation and reduction.

Balancing Equation Example:

Q. Balance the equation: Solution:

5. Acids, Bases & Salts

Key Concepts:

  • Acids: Sour taste, pH < 7 (e.g., HCl, H₂SO₄)

  • Bases: Bitter taste, pH > 7 (e.g., NaOH, KOH)

  • Neutralization: Acid + Base → Salt + Water

pH Scale:

  • pH = 7: Neutral (e.g., Pure water)

  • pH < 7: Acidic (e.g., Lemon juice)

  • pH > 7: Basic (e.g., Soap solution)

6. Environmental Chemistry

Key Concepts:

  • Air Pollution: Caused by CO₂, SO₂, etc.

  • Water Pollution: Caused by industrial waste, oil spills.

  • Ozone Layer Depletion: Due to CFCs (Chlorofluorocarbons).

Sample Questions:

  1. What happens when sodium reacts with water? Answer: Sodium reacts with water to form Sodium Hydroxide (NaOH) and Hydrogen gas (H₂).

  2. Which gas is used in fire extinguishers? Answer: Carbon Dioxide (CO₂).

  3. What is the pH value of pure water? Answer: 7 (Neutral).


WBP SI Exam - Biology Detailed Notes, Important Concepts & Questions

1. Human Anatomy & Physiology

Key Concepts:

  • Digestive System: Mouth → Esophagus → Stomach → Small Intestine → Large Intestine → Anus

  • Respiratory System: Nose → Trachea → Lungs (Gas exchange occurs in alveoli)

  • Circulatory System: Heart (4 chambers - 2 atria & 2 ventricles), Blood vessels (Arteries, Veins, Capillaries)

  • Nervous System: Brain, Spinal Cord, Nerves

  • Endocrine System: Hormone-producing glands (e.g., Pituitary, Thyroid, Adrenal)

Sample Question:

Q. Which part of the human body is known as the "Powerhouse of the cell"?
Answer: Mitochondria

2. Human Diseases & Immunity

Key Concepts:

  • Communicable Diseases: Spread through infection (e.g., Tuberculosis, Cholera, Malaria)

  • Non-Communicable Diseases: Lifestyle diseases (e.g., Diabetes, Hypertension)

  • Vaccines: Provide immunity against diseases like Polio, Hepatitis B

Sample Question:

Q. Which disease is caused by the Plasmodium parasite?
Answer: Malaria

3. Plant Physiology

Key Concepts:

  • Photosynthesis: Process by which plants prepare food.
    Equation:

  • Transpiration: Loss of water vapor from plant leaves.

  • Pollination: Transfer of pollen grains from anther to stigma.

Sample Question:

Q. What is the green pigment in plants responsible for photosynthesis?
Answer: Chlorophyll

4. Cell Biology

Key Concepts:

  • Cell Structure: Cell membrane, Cytoplasm, Nucleus

  • Plant Cells vs Animal Cells: Plant cells have a cell wall and chloroplasts; animal cells do not.

Sample Question:

Q. Which cell organelle controls all cellular activities?
Answer: Nucleus

5. Genetics & Heredity

Key Concepts:

  • DNA (Deoxyribonucleic Acid): Genetic material found in cells.

  • Genes: Units of heredity responsible for inherited traits.

  • Chromosomes: Carry genetic information; humans have 46 chromosomes (23 pairs).

Sample Question:

Q. Who is known as the "Father of Genetics"?
Answer: Gregor Mendel

6. Environment & Ecology

Key Concepts:

  • Ecosystem: Interaction between living and non-living components.

  • Food Chain: Energy transfer in a sequence (Producers → Consumers → Decomposers)

  • Conservation: Methods to protect biodiversity (e.g., Afforestation, Recycling)

Sample Question:

Q. What is the main gas responsible for the greenhouse effect?
Answer: Carbon Dioxide (CO₂)



Tags:

একটি মন্তব্য পোস্ট করুন

0 মন্তব্যসমূহ