"100 Important Physical Quantities for CBSE Class 11 & 12 Physics"

📚 100 Important Physical Quantities for CBSE Class 11 & 12 Physics

Complete list with definitions, SI units, and dimensional formulas — essential for board exams & competitive exams like NEET/JEE

100 Important Physical Quantities for CBSE Class 11 & 12 Physics

Complete reference with definitions, SI units, and dimensional formulas | Essential for Board Exams, NEET & JEE

📖 Part 1: Class 11 Physical Quantities (Mechanics, Properties of Matter, Thermodynamics, Waves)

#	Physical Quantity	Definition	SI Unit	Dimensions
1	Length	Distance between two points	metre (m)	[L]
2	Mass	Quantity of matter in a body	kilogram (kg)	[M]
3	Time	Duration between events	second (s)	[T]
4	Area	Extent of a two-dimensional surface	m²	[L²]
5	Volume	Space occupied by a three-dimensional object	m³	[L³]
6	Velocity	Rate of change of displacement	m/s	[L T⁻¹]
7	Acceleration	Rate of change of velocity	m/s²	[L T⁻²]
8	Force	Product of mass and acceleration	newton (N)	[M L T⁻²]
9	Momentum	Product of mass and velocity	kg·m/s	[M L T⁻¹]
10	Work	Force × displacement in direction of force	joule (J)	[M L² T⁻²]
11	Energy	Capacity to do work	joule (J)	[M L² T⁻²]
12	Power	Rate of doing work	watt (W)	[M L² T⁻³]
13	Pressure	Force per unit area	pascal (Pa)	[M L⁻¹ T⁻²]
14	Stress	Restoring force per unit area	Pa	[M L⁻¹ T⁻²]
15	Strain	Ratio of change in dimension to original dimension	unitless	[M⁰ L⁰ T⁰]
16	Young’s Modulus	Ratio of stress to longitudinal strain	Pa	[M L⁻¹ T⁻²]
17	Bulk Modulus	Ratio of volumetric stress to volumetric strain	Pa	[M L⁻¹ T⁻²]
18	Shear Modulus	Ratio of shear stress to shear strain	Pa	[M L⁻¹ T⁻²]
19	Poisson’s Ratio	Ratio of lateral strain to longitudinal strain	unitless	[M⁰ L⁰ T⁰]
20	Surface Tension	Force per unit length	N/m	[M T⁻²]
21	Viscosity Coefficient	Tangential force per unit area per unit velocity gradient	Pa·s	[M L⁻¹ T⁻¹]
22	Density	Mass per unit volume	kg/m³	[M L⁻³]
23	Relative Density	Ratio of density of substance to density of water	unitless	[M⁰ L⁰ T⁰]
24	Specific Gravity	Same as relative density	unitless	[M⁰ L⁰ T⁰]
25	Temperature	Measure of average kinetic energy of molecules	kelvin (K)	[K]
26	Heat	Form of energy transferred due to temperature difference	joule (J)	[M L² T⁻²]
27	Specific Heat Capacity	Heat required per unit mass per unit temperature rise	J/(kg·K)	[L² T⁻² K⁻¹]
28	Heat Capacity	Heat required per unit temperature rise	J/K	[M L² T⁻² K⁻¹]
29	Latent Heat	Heat absorbed or released during phase change per unit mass	J/kg	[L² T⁻²]
30	Thermal Conductivity	Rate of heat transfer through unit thickness per unit temperature gradient	W/(m·K)	[M L T⁻³ K⁻¹]
31	Coefficient of Thermal Expansion	Fractional change in length per degree temperature change	K⁻¹	[K⁻¹]
32	Angular Displacement	Angle through which an object rotates	radian (rad)	[M⁰ L⁰ T⁰]
33	Angular Velocity	Rate of change of angular displacement	rad/s	[T⁻¹]
34	Angular Acceleration	Rate of change of angular velocity	rad/s²	[T⁻²]
35	Moment of Inertia	Rotational inertia; sum of mr² for all particles	kg·m²	[M L²]
36	Torque	Moment of force; force × perpendicular distance	N·m	[M L² T⁻²]
37	Angular Momentum	Moment of inertia × angular velocity	kg·m²/s	[M L² T⁻¹]
38	Rotational Kinetic Energy	½ I ω²	joule (J)	[M L² T⁻²]
39	Gravitational Potential	Work done per unit mass to bring mass from infinity	J/kg	[L² T⁻²]
40	Gravitational Potential Energy	Work done against gravity	J	[M L² T⁻²]
41	Acceleration due to Gravity	Gravitational acceleration at Earth’s surface	m/s²	[L T⁻²]
42	Universal Gravitational Constant	G in F = G m₁m₂/r²	N·m²/kg²	[M⁻¹ L³ T⁻²]
43	Escape Velocity	Minimum velocity to escape gravitational field	m/s	[L T⁻¹]
44	Orbital Velocity	Velocity of satellite in orbit	m/s	[L T⁻¹]
45	Frequency	Number of oscillations per second	hertz (Hz)	[T⁻¹]
46	Time Period	Time for one complete oscillation	s	[T]
47	Amplitude	Maximum displacement from mean position	m	[L]
48	Wavelength	Distance between consecutive crests/troughs	m	[L]
49	Wave Velocity	Speed of wave propagation	m/s	[L T⁻¹]
50	Intensity of Wave	Power per unit area	W/m²	[M T⁻³]

⚡ Part 2: Class 12 Physical Quantities (Electrostatics, Magnetism, EMI, Optics, Modern Physics)

#	Physical Quantity	Definition	SI Unit	Dimensions
1	Electric Charge	Property of matter causing electric force	coulomb (C)	[A T]
2	Electric Current	Rate of flow of charge	ampere (A)	[A]
3	Electric Potential	Work done per unit charge to bring from infinity	volt (V)	[M L² T⁻³ A⁻¹]
4	Potential Difference	Work done per unit charge between two points	V	[M L² T⁻³ A⁻¹]
5	Electromotive Force (EMF)	Work done per unit charge by source	V	[M L² T⁻³ A⁻¹]
6	Electric Field Intensity	Force per unit positive charge	N/C or V/m	[M L T⁻³ A⁻¹]
7	Electric Dipole Moment	Charge × separation distance	C·m	[L T A]
8	Capacitance	Charge stored per unit potential difference	farad (F)	[M⁻¹ L⁻² T⁴ A²]
9	Resistance	Opposition to flow of current	ohm (Ω)	[M L² T⁻³ A⁻²]
10	Resistivity	Resistance × area / length	Ω·m	[M L³ T⁻³ A⁻²]
11	Conductivity	Reciprocal of resistivity	S/m	[M⁻¹ L⁻³ T³ A²]
12	Drift Velocity	Average velocity of electrons in conductor	m/s	[L T⁻¹]
13	Mobility	Drift velocity per unit electric field	m²/(V·s)	[M⁻¹ T² A]
14	Electric Power	Rate of electrical energy consumption	watt (W)	[M L² T⁻³]
15	Electric Energy	Power × time	J or kWh	[M L² T⁻²]
16	Internal Resistance	Resistance inside a cell/battery	Ω	[M L² T⁻³ A⁻²]
17	Magnetic Field	Region where magnetic force acts	tesla (T)	[M T⁻² A⁻¹]
18	Magnetic Flux	Magnetic field × area	weber (Wb)	[M L² T⁻² A⁻¹]
19	Magnetic Dipole Moment	Current × area of loop	A·m²	[L² A]
20	Magnetic Field Intensity	Magnetizing force; H in B = μH	A/m	[L⁻¹ A]
21	Magnetization	Magnetic moment per unit volume	A/m	[L⁻¹ A]
22	Magnetic Susceptibility	Ratio of magnetization to magnetic field intensity	unitless	[M⁰ L⁰ T⁰]
23	Permeability of Free Space	μ₀ in Biot-Savart law	H/m	[M L T⁻² A⁻²]
24	Permittivity of Free Space	ε₀ in Coulomb’s law	F/m	[M⁻¹ L⁻³ T⁴ A²]
25	Induced EMF	EMF produced by changing magnetic flux	V	[M L² T⁻³ A⁻¹]
26	Self-Inductance	Flux linkage per unit current	henry (H)	[M L² T⁻² A⁻²]
27	Mutual Inductance	Induced EMF in secondary per rate of change of current in primary	H	[M L² T⁻² A⁻²]
28	Reactance	Opposition to AC due to L or C	Ω	[M L² T⁻³ A⁻²]
29	Impedance	Total opposition to AC (resistance + reactance)	Ω	[M L² T⁻³ A⁻²]
30	Quality Factor (Q-factor)	Resonance sharpness in LCR circuit	unitless	[M⁰ L⁰ T⁰]
31	Power Factor	cos φ in AC circuits	unitless	[M⁰ L⁰ T⁰]
32	Displacement Current	Rate of change of electric flux	A	[A]
33	Refractive Index	Ratio of speed of light in vacuum to in medium	unitless	[M⁰ L⁰ T⁰]
34	Focal Length	Distance from lens/mirror to focus	m	[L]
35	Power of Lens	Reciprocal of focal length (in meters)	dioptre (D)	[L⁻¹]
36	Magnification	Ratio of image height to object height	unitless	[M⁰ L⁰ T⁰]
37	Angular Magnification	Ratio of angle subtended by image to object	unitless	[M⁰ L⁰ T⁰]
38	Fringe Width	Distance between consecutive fringes in YDSE	m	[L]
39	Resolving Power	Ability to distinguish closely spaced objects	unitless	[M⁰ L⁰ T⁰]
40	Work Function	Minimum energy to eject electron from metal surface	eV or J	[M L² T⁻²]
41	Stopping Potential	Potential that stops most energetic photoelectrons	V	[M L² T⁻³ A⁻¹]
42	de Broglie Wavelength	Wavelength associated with moving particle	m	[L]
43	Binding Energy	Energy required to disassemble nucleus into nucleons	J or MeV	[M L² T⁻²]
44	Mass Defect	Difference between mass of nucleus and sum of nucleons	kg	[M]
45	Activity	Rate of radioactive decay	becquerel (Bq)	[T⁻¹]
46	Half-Life	Time for half of radioactive nuclei to decay	s	[T]
47	Mean Life	Average lifetime of radioactive nucleus	s	[T]
48	Energy Band Gap	Energy difference between valence and conduction band	eV or J	[M L² T⁻²]
49	Gain (Transistor)	Ratio of output to input signal	unitless	[M⁰ L⁰ T⁰]
50	Mobility of Charge Carriers	Drift velocity per unit electric field in semiconductors	m²/(V·s)	[M⁻¹ T² A]

📐 Dimensional Analysis Match-Up

Drag the dimension to the correct physical quantity (click to reveal answer).

🃏 Quick Revision Flashcards

Click on any card to flip and see the SI unit + dimension.

Force

PressureEnergy

Capacitance

Resistance

Magnetic Flux

🔍 Find the Error Challenge

Each statement below has ONE mistake. Can you spot it?

❌ Statement 1: « Pressure and stress have different dimensional formulas. »
❌ Statement 2: « The SI unit of electric potential is joule. »
❌ Statement 3: « Moment of inertia has dimensions [M L T⁻²]. »

📥 One-Page Revision Cheat Sheet

All 100 quantities + dimensions + SI units condensed into 2 printable pages.

📄 Download PDF Cheat Sheet

*Right-click and save, or print directly.

📝 10-Question Self-Test

Test your knowledge of SI units and dimensions.

1. SI unit of velocity?

2. Dimension of force?

3. SI unit of capacitance?

4. Dimension of electric potential?

5. SI unit of angular momentum?

« 100 Important Physical Quantities for CBSE Class 11 & 12 Physics »

📚 100 Important Physical Quantities for CBSE Class 11 & 12 Physics

100 Important Physical Quantities for CBSE Class 11 & 12 Physics

📐 Dimensional Analysis Match-Up

🃏 Quick Revision Flashcards

🔍 Find the Error Challenge

📥 One-Page Revision Cheat Sheet

📝 10-Question Self-Test

En savoir plus sur eduPhysics

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