Difference between in Physics

Difference between in Physics

Class 9

Linear motion and rotational motion

Uniform motion and non uniform motion Distance vs displacement
Speed vs velocity Uniform circular motion vs non uniform circular motion

1st eqn of motion vs 2nd eqn of motion

2nd eqn of motion vs 3rd eqn

Balanced force vs unbalanced force Inertia at rest vs inertia of motion
1st laws of motion vs 2nd law of motion 2nd law of motion vs 3rd law of motion

Action forces vs reaction forces

Mass vs momentum

Newton vs Kepler Kepler’s law vs Newton’s law
Mass vs weight Gravitational force vs fundamental forces

Acceleration due gravity at altitude vs acceleration due to gravity at depth

Gravity at poles vs gravity at equator

Accelerated motion vs free fall Weight on earth vs weight on moon
Thrust vs pressure Gravitational force vs buoyant force

Floating of substance vs sinking of substance

Pressure in fluids vs pressure in solids

Work vs energy Positive work vs negative work
Potential energy vs Kinetic energy Joule vs calorie

Potential energy at height vs potential energy on surface

Power vs energy

Longitudinal wave vs transverse wave Mechanical waves vs electromagnetic waves
Compression vs rarefaction Reflection of sound vs absorption of sound

Echo vs reverberation

Infrasonic sound vs ultrasonic sound

Middle ear vs inner ear

 Class 10

Difference between Reflection and Refraction

Concave mirror vs Convex mirror Convergence and Divergence
Uses of convex mirror vs uses of concave mirror. Image formation of concave mirror vs convex mirror


Laws of reflection vs laws of refraction

Convex lens vs concave lens

Uses of convex lens vs concave lens Image formation of.convex lens vs concave lens
Sign conventions of mirrors vs lenses Rules of reflection by mirrros vs refraction by lens

Power of convex lens vs concave lens.

Cornea vs iris

Eye lens vs retina Ciliary muscles vs Optical nerves
least DDV vs far DDV Myopia vs hypermetropia

Myopia vs presbyopia

Hypermetropia vs presbyopia

Correction of myopia vs correction of hypermetropia Dispersion vs Scattering
Twinkling of starts vs planets Advanced sunrise vs delayed sunset


Electric current vs Potential difference

Metals vs non metals

Resistance vs Resistivity Resistivity vs Conductivity
Conductors vs Non metals Electric fuse vs filament in bulb

Electric current vs electric circuit

Electric circuit vs circuit diagram

Ohms law vs Joules law Electric power vs electric energy
Short circuiting vs overloading Ammeter vs voltmeter

Resistor in series vs resistors in parallel

Magnetic effect of current vs electromagnetic induction

Bar magnet vs solenoid Flemings left hand rule vs Fleming’s right hand rule
Alternating current vs direct current Electric motor vs electric generator

Oerstad expt vs Faraday’s expt

AC generator vs DC generator

Galvanometer vs Ammeter Magnetic lines of force vs electric lines
Working of motor vs working of generator Good sources of energy vs bad sources of energy

Conventional sources vs non conventional source

Fossil fuel vs Bio gas

Thermal power plant vs hydropower plant Wind energy vs solar energy
Solar cooker vs solar cell Tidal energy vs save energy

Ocean thermal energy vs geothermal energy

 Class 11

Gravitational force vs Electromagnetic force

Strong nuclear force vs weak nuclear force


Fundamental and derived unit
MKS UNIT VS CGS UNIT Accuracy vs Errors

Instrumental errors vs personal errors

Absoulte error vs Relative error

Significant figure vs Order of magnitude Path length vs displacement
Uniform motion vs Non uniform motion Instantaneous velocity and Instantaneous speed

Instanteneous velocity vs instanteneous accelearation

1st eqn of motion vs 2nd equation of motion

Scalars and vectors Triangle law of vector vs parallelogram law
Positive vectors vs negative vectors Dot product vs cross product

Horizontal range vs maximum height

Projectile motion vs rectilinear motion Time of ascent vs time of descent Uniform CM vs Non UCM

Centripetal force vs centrifugal force

1st law vs 2nd law Mass vs momentum
Static friction vs rolling friction Kinetic friction vs rolling friction

Static friction vs rolling friction

Coefficient of static friction vs coefficient of kinetic friction

Limiting force of static friction vs limiting force of kinetic friction Motion of car on horizontal road vs motion of car on banked road
Kinetic energy vs potential energy Exothermic vs endothermic

Heat vs electrical energy

Chemical energy vs nuclear energy

Elastic collision vs inelastic collision Collision in one dimensions vs collisions in two dimensions
Translational motion vs rotational motion Centre of mass vs centre of gravity

Linear momentum vs angular momentum

Scalar product vs vector product

Linear displacement vs angular displacement


Linear velocity vs angular velocity
Linear acceleration vs angular acceleration Centripetal acceleration vs angular acceleration

Force and torque

Conservation of linear momentum vs angular momentum

Mass vs moment of inertia Translational motion vs rolling motion
g at altitude vs g at depth Critical speed vs escape speed

Geostationary satellites vs polar satellites

Mass vs weight

Weight at equator vs weight at poles Rigidity vs Elasticity
Elasticity vs plasticity Stress vs strain

Tensile stress vs strain

Volume stress vs strain Shearing stress vs strain Young’s modulus vs bulk modulus

Young’s modulus vs modulus of rigidity

Brittleness vs ductility Atmospheric pressure vs gauge pressure
Mercury barometer vs open tube manometer Hydraulic press vs hydraulic brakes

Streamline flow vs turbulent flow

Viscosity vs surface tension

ST with soluble impurities vs insoluble impurities. Temperature and heat
Celcius scale vs Fahrenheit scale Boyles law vs Charles law.

Linear expansion vs areal expansion

Areal expansion vs volume expansion

Molar sp. heat at constant pressure vs constant volume Latent heat of fusion vs vaporization
Conduction vs convection Adiabatic wall vs diathermic wall

1st law of thermodynamics vs 2nd law of thermodynamics

Isothermal process vs isobaric process

Adiabatic process vs isochoric process Reversible process vs irreversible process
Sp heat capacity for monoatomic gas vs diatomic gas Sp.heat capacity of water vs solid

Gas vs solid

Periodic motion vs non periodic motion

Oscillatory motion vs linear motion SHM.vs UCM
Displacement of SHM vs Velocity of SHM Maximum value of displacement vs velocity of SHM

Simple pendulum vs conical pendulum

Free oscillation vs forced oscillation

Forced vibrations vs resonance Natural frequency vs external frequency
Restoring force vs external force Transverse wave vs longitudinal wave

Wavelength and wave number

Speed of transverse wave vs longitudinal wave

Reflection of longitudinal wave vs transverse wave Nodes vs antinode
Harmonic vs overtones Vibrations of pipe closed at one end vs open at both ends

Waxing and waning

 Class 12

Electricity vs magnetism Conductors vs insulators

Like charges vs unlike charges

Electric field due to sphere vs cylinder

Potential due to point charge vs dipole

Potential energy of single charge vs dipole

Polar molecules vs non polar molecule

Capacitors in series vs parallel Resistors in series vs parallel

Kirchhoff’s 1st law vs Kirchhoff’s 2nd law

Meter bridge vs potentiometer

EMF by direct method and EMF by combination method

Voltmeter vs potentiometer

Biot Saverts law vs Ampere’s law

Solenoid vs toroid

Paramagnetism vs diamagnetism

Diamagnetism vs ferromagnetism

Permanent magnet vs electromagnet

Faraday’s law vs Lenz’s law

Self inductance vs mutual inductance AC with inductor vs AC with capacitor
RMS current vs RMS emf Reactance vs Impedance

Series resonance vs parallel resonance

Step up transformer vs step down transformer

Radio wave vs microwave Infrared vs visible rays


UV rays vs X rays Gamma rays vs X rays

Lyman series vs Paschen Series

Balmer series vs Brackett series

Rutherford atomic model vs Bohr’s atomic mod Orbit Vs State
Effect of intensity on photoelectric current vs effect of frequency Photo electric effect vs Wave thoery

Alpha decay vs Beta decay

Alpha decay vs Gamma decay

Nuclear fusion vs Nuclear fission P type semiconductor vs n type semiconductor
Conduction band vs valance band Intrinsic semiconductor vs extrinsic semiconductor

PN junction diode forward bias vs reverse bias

Half wave rectifier vs full wave rectifier

LED vs Solar cell AND gate vs OR gate
NAND gate vs NOR gate Newton’s corpuscles vs Huygens wave theory

Wavefront vs Wave normal

Coherent sources vs Incoherent sources

Constructive interference vs Destructive interference

Interference vs Diffraction

Fresnels diffraction vs Fraunhofer diffraction


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Updated: March 12, 2022 — 2:13 pm

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