Daily Quizzes
Mock Tests
No tests attempted yet.
Select Category
Important RRB Group D Science Formulas – Check Complete Details
Preparing for the RRB Group D Exam requires a strong command of basic Science concepts, especially Physics and Chemistry formulas. Many questions in the General Science section are formula-based and test conceptual clarity rather than deep theoretical knowledge. If you understand the key formulas and know how to apply them, you can easily score high in this section.
Physics Formulas for RRB Group D
Physics plays a crucial role in the RRB Group D Science syllabus. Most questions are numerical or concept-based from motion, work, energy, electricity, and heat.
Railway Group D - Motion (Kinematics) – Important Formulas
| Concept | Formula | Meaning / Notes |
|---|---|---|
| Speed | Speed = Distance / Time | Measures how fast an object moves. Scalar quantity. |
| Velocity | Velocity = Displacement / Time | Speed in a particular direction. Vector quantity. |
| Acceleration | Acceleration = Change in Velocity / Time | Rate of change of velocity. |
| First Equation of Motion | v = u + at | v = Final velocity, u = Initial velocity, a = Acceleration, t = Time |
| Second Equation of Motion | s = ut + ½ at² | s = Displacement |
| Third Equation of Motion | v² = u² + 2as | Used when time is not given |
RRB Group D - Work, Energy and Power
| Concept | Formula | Meaning / Notes | SI Unit |
|---|---|---|---|
| Work Done | Work = Force × Distance | Work is done when force causes displacement in the direction of force. | Joule (J) |
| Kinetic Energy (KE) | KE = ½ mv² | Energy possessed by a body due to its motion. | Joule (J) |
| Potential Energy (PE) | PE = mgh | Energy stored due to height (gravity effect). | Joule (J) |
| Power | Power = Work / Time | Rate at which work is done. | Watt (W) |
Group D: Force and Laws of Motion
Force:
F = ma
Where:
- F = Force
- m = Mass
- a = Acceleration
Momentum:
Momentum = Mass×Velocity
Frequently asked from Newton’s Laws.
RRB Group D: Pressure Formula
Pressure: Pressure= Area / Force
Unit: Pascal (Pa)
Questions may include pressure in liquids and atmospheric pressure.
Heat and Temperature Formulas for Railway Group D:
| Concept | Formula | Meaning / Explanation | SI Unit |
|---|---|---|---|
| Heat Energy (Q) | Q = mcΔT | Heat absorbed or released by a substance when temperature changes. | Joule (J) |
| m (Mass) | — | Amount of substance (in kilograms). | kg |
| c (Specific Heat Capacity) | — | Heat required to raise temperature of 1 kg substance by 1°C (or 1 K). | J/kg·K |
| ΔT (Change in Temperature) | — | Final Temperature − Initial Temperature | °C or K |
Group D: Electricity Formulas
| Concept | Formula | Explanation | SI Unit |
|---|---|---|---|
| Ohm’s Law | V = IR | Voltage is equal to Current × Resistance | V (Volt) |
| Voltage (V) | V = IR | Potential difference across a conductor | Volt (V) |
| Current (I) | I = V / R | Flow of electric charge | Ampere (A) |
| Resistance (R) | R = V / I | Opposition to flow of current | Ohm (Ω) |
| Electric Power | P = VI | Power consumed in an electric circuit | Watt (W) |
| Power (using current) | P = I²R | Used when current is known | Watt (W) |
| Power (using voltage) | P = V² / R | Used when voltage is known | Watt (W) |
Density Formulas for RRB Group D:
| Concept | Formula | Explanation | SI Unit |
|---|---|---|---|
| Density | Density = Mass / Volume | Density tells us how much mass is present in a given volume of a substance | kg/m³ |
| Symbol Form | ρ = m / V | ρ (rho) = Density, m = Mass, V = Volume | kg/m³ |
| Mass | m = ρ × V | Used when density and volume are given | Kilogram (kg) |
| Volume | V = m / ρ | Used when mass and density are given | m³ |
Chemistry Formulas for RRB Group D
| Topic | Formula | Explanation | Used In | Important Notes |
|---|---|---|---|---|
| Percentage Composition | % = (Part / Whole) × 100 | Calculates percentage of a component in a mixture or compound | Concentration problems, Chemical composition | Frequently asked in basic numerical questions |
| Molarity (M) | M = Number of Moles / Volume (in Liters) | Measures concentration of a solution | Solutions & Concentration | Volume must be in Liters |
| pH Formula | pH = −log[H⁺] | Measures acidity or basicity of a solution | Acids & Bases | pH < 7 = Acid, pH = 7 = Neutral, pH > 7 = Base |
| Law of Conservation of Mass | Mass of Reactants = Mass of Products | Matter is neither created nor destroyed in a reaction | Balancing Chemical Equations | Important for equation balancing |
- Practice simple numerical problems on Molarity & Percentage
- Learn basic pH values (e.g., pure water = 7)
- Balancing chemical equations is commonly asked in exams.
RRB Group D: Biology Concepts (No Heavy Formulas)
Biology in RRB Group D usually focuses on:
- Human body systems
- Nutrition
- Diseases
- Plants
- Cells
Though formulas are fewer, remember:
- Pulse Rate: 72 beats/min (average)
- Normal Body Temperature: 37°C or 98.6°F
Important Units and Conversions Railway Group D
| Quantity | Unit |
|---|---|
| Force | Newton |
| Work | Joule |
| Power | Watt |
| Pressure | Pascal |
| Current | Ampere |
| Voltage | Volt |
| Resistance | Ohm |
High-Weightage Science Topics in RRB Group D
Focus more on:
- Motion and Laws of Motion
- Work and Energy
- Electricity
- Human Body System
- Acids, Bases and Salts
- Heat and Temperature
Why Science Formulas Are Important for RRB Group D?
Science formulas are important for RRB Group D because they help solve numerical questions quickly and accurately. Physics and Chemistry formulas are frequently asked in the exam. Knowing formulas improves speed, reduces calculation errors, and boosts confidence. Strong formula preparation can help candidates score higher in the General Science section.
Conclusion
Mastering key Science formulas is crucial for RRB Group D success. Most questions are concept-based and require direct formula application. Regular revision, numerical practice, and clarity of basics improve speed and accuracy. Focus on high-weightage topics to score better in the General Science section and increase selection chances.
