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Formulae Vault

Science Formulae

Master every concept with our curated repository of formulae, theorems, and key identities for CBSE 2026.

⚛️ Science — Unit Wise Index

📂Unit I: CHEMICAL SUBSTANCES
1

Combination Reaction

Medium
A + B → AB

Description: Two or more elements/compounds form a single product

2

Decomposition Reaction

Medium
AB → A + B

Description: A single compound breaks down into two or more simpler substances

3

Displacement Reaction

Medium
A + BC → AC + B

Description: A more reactive element displaces a less reactive element

1

pH Definition

Medium
pH = -log[H+]

Description: Measure of hydrogen ion concentration

2

Neutralization

Medium
Acid + Base → Salt + Water

Description: Reaction between an acid and a base

📭
No Formulae for this Chapter
Chapter “Metals and Non-metals” has no formulae yet. Content is being prepared.
📭
No Formulae for this Chapter
Chapter “Carbon and its Compounds” has no formulae yet. Content is being prepared.
📭
No Formulae for this Chapter
Chapter “Periodic Classification of Elements” has no formulae yet. Content is being prepared.
📂Unit II: WORLD OF LIVING
📭
No Formulae for this Chapter
Chapter “Life Processes” has no formulae yet. Content is being prepared.
📭
No Formulae for this Chapter
Chapter “Control and Coordination” has no formulae yet. Content is being prepared.
📭
No Formulae for this Chapter
Chapter “Heredity and Evolution” has no formulae yet. Content is being prepared.
📂Unit III: NATURAL PHENOMENA
1

Mirror Formula

Medium
1/f = 1/v + 1/u

Description: Relation between focal length, object distance, and image distance

2

Lens Formula

Medium
1/f = 1/v - 1/u

Description: Relation for spherical lenses

3

Magnification

Medium
m = height of image / height of object = -v/u

Description: Ratio of image height to object height

4

Power of a Lens

Medium
P = 1/f(in meters)

Description: Measure of divergence or convergence of lens (Dioptres)

5

Refractive Index

Medium
n = c/v

Description: Speed of light in vacuum to speed in medium

📭
No Formulae for this Chapter
Chapter “Human Eye and Colourful World” has no formulae yet. Content is being prepared.
📂Unit IV: EFFECTS OF CURRENT
1

Ohm's Law

Medium
V = IR

Description: Voltage across a conductor is proportional to current

2

Electrical Power

Medium
P = VI = I²R = V²/R

Description: Rate of electrical energy consumption

3

Resistance in Series

Medium
Rs = R1 + R2 + R3

Description: Equivalent resistance of series circuit

4

Resistance in Parallel

Medium
1/Rp = 1/R1 + 1/R2 + 1/R3

Description: Equivalent resistance of parallel circuit

5

Joule's Law of Heating

Medium
H = I²Rt

Description: Heat produced in a resistor

📭
No Formulae for this Chapter
Chapter “Magnetic Effects of Electric Current” has no formulae yet. Content is being prepared.
📂Unit V: NATURAL RESOURCES
📭
No Formulae for this Chapter
Chapter “Sources of Energy” has no formulae yet. Content is being prepared.
📭
No Formulae for this Chapter
Chapter “Our Environment” has no formulae yet. Content is being prepared.
📭
No Formulae for this Chapter
Chapter “Sustainable Management of Natural Resources” has no formulae yet. Content is being prepared.