# Most Important Topics Of Physics For JEE Mains 2021

If You Are Preparing For JEE Mains 2021 Then This Post Will Be A Great Help For All JEE MAINS 2021 Aspirants. In This Post I Have Written About “Most Important Topics Of Physics For JEE Mains 2021”.

All Of You Know That In This I Am Writing About Most Important Topics. So I Have Written Most Important Topics Of Physics From Every Chapter.

So Let's Begin And Read This Complete Article Carefully.

 Motion in 1D ● Stopping distance● Equation of motion ● Free fall-two bodies at the same time ● Graphs

 Motion in 2D ● Projectile motion ● vectors

 Laws of motion ● String -block and pulley-block. ● Apparent weight inside a lift ● Equilibrium of a body ● Coefficient of friction ● Block on an inclined plane( most repeated) ● Block held stationary against a wall ● Problems are combined with rotational motion

 Elasticity ● Change in length of a wire due to stress ● Work done in stretching ● Problems from this section are generally combined with thermal expansion, SHM, waves on a string and mechanics ● Bulk modulus

 Thermal expansion ● Thermal stress( two rods fixed between rigid support then heated or cooled) ● Relation among coefficients of expansion

 Calorimetry & Heat transfer ● Calorimetry problems are similar as they all involve just equating heat lost to heat gained ● Heat loss of bullet embedded in wood ● Effective thermal resistance of composite slab, concentric cylinders or spheres. ● Temperature at the interface of two slabs, T shape, Y shape or any other shape. ● Stefan's law- power radiated by a body- radiant energy received on earth ● Newton’s cooling

 Work, power and energy and collisions ● Vertical circle● Work calculation when force and displacement are given in vector form● Work done by spring force● spring -mass ● Power ● Combined with collisons( Energy loss due to collision/ final speed after collision)● Collision in 2D

 COM & Rotational motion ● Body breaks into two parts during motion, velocity of COM ● Finding coordinates of COM( a portion of body is cut out ) ● MOI of rigid body using theorem of perpendicular and parallel axis ● Torque and rotational equilibrium ● Angular velocity and conservation of angular momentum ● Two discs placed on top of each other ● Circular disk or cylinder as pulley, cylinder and rope ● Rod pivoted at one end ● Rolling without slipping

 Gravitation ● Gravitational potential energy ● Energy required to launch a satellite into a orbit + energy to move from one orbit to another+ orbital time period ● Escape velocity ● Variation of g with altitude and depth ● Graphs ● Variable mass density problems

 Fluid mechanics ● Pressure due to two immiscible liquids ● Terminal velocity ● Excess pressure - soap bubble( work done to blow a bubble) and water droplet ● Work done by surface tension ● Buoyant force ● Equation of continuity and bernoulli's theorem ● Velocity of efflux ● Capillary rise

 Kinetic theory of gases ● Rms speed ● Molar specific heats  ● Mixture of gases - ratio of Cp and Cv, calculation of thermal energy, internal energy and total energy● Degrees of freedom● Mean free path

 Thermodynamics ● Calculation of work done or change in internal energy of system using first law of thermodynamics for various processes  ● Adiabatic process ● Work done and efficiency of cyclic process ● Carnot engine ● Indicator diagrams ( representation of same process in different state variables)

 SHM ● Equation of SHM ● Phase difference ● Spring-block system ( parallel and series combination) ● Change in time period of pendulum with length and mass ● Time period when point of suspension accelerates( lift, inclined plane and circular turn) ● Spring block rotation on a table

 String Waves & Sound waves ● General equation of travelling wave ● Tension in the string ● Interference of waves ● Stationary waves ● Organ pipes and resonance column ● Intensity of wave ● Doppler effect+beats ● Pressure wave

 Electrostatic field ● Charge configuration in equilibrium ● Force between two charged conductors after contact ● Field due to variable charge density ( density as a function of r) ● Flux involving cube ● Field due to dipole

 Electrostatic potential ● Work done in moving a charge between two points ● Potential of concentric spherical shells ● Graph of variation of potential and electric field with distance ● Potential energy of system of charges ● Motion of charged particle in an uniform electric field

 Current electricity ● Equivalent resistance● Power and heating effect● Potentiometer and metre bridge● Combination of cells

 Moving charges and magnetic effects of current ● Lorentz force, circular motion of a charged particle in magnetic field and helical motion ● Net magnetic field at a point due to current carrying conductors in various shapes ● Magnetic field of circular loops ( two loops arranged parallel and perpendicular to each other)  ● Solenoid and toroid● Galvanometer● Magnetic moment

 Electromagnetic induction and Alternating current ● Induced emf ( varying magnetic field, varying area, rotation of loop )● Motional emf● Mutual inductance and self induction● LCR circuit problems, Power factor ● Phase difference● Resonant frequency● Efficiency of transformer

 Ray optics ● Inclined mirrors + number of images formed ● Mirror equation ● Lateral shift ● Apparent depth ● Relation between critical angle and refractive index ( fish looking up through water surface ● Minimum deviation and prism ● Lens makers formula +thin lens equation ● Combination of lenses ( concave and convex lens separated by a distance, plano concave and plano convex lens) ● Velocity of image ● Lenses and glass slab ( shift in the position of images) ● Magnification of compound microscope and telescope

 Wave optics ● Interference conditions, maximum and minimum intensity ● Diffraction due to single slit ( angular direction of maxima or minima and central maxima width ● Young's double slit experiment ● Malus law

 Dual nature of matter ● De Broglie wavelength( sometimes combined with collision) ● Photoelectric effect -work function , threshold frequency, maximum velocity ( kinetic energy ) of ejected electrons, stopping potential ● graphs

 atoms ● Energy required for electron excitation ● Transition of electrons( diagram, frequency and wavelength of emitted radiation) ● Radii and energy levels of possible orbitals for a given central potential U(r)

 Nuclei ● Decay constant, half life ● Binding energy ● Energy released due to fission ● Alpha and beta decay

 EMW ● Equation of electromagnetic wave ● Relation between electric field component and magnetic field component ● Force on charged particle due to electromagnetic wave ● Energy density

 Semiconductors ● Concentration of electrons and holes ● Mobility of electrons ● Diodes circuit ● Band energy ● Zener diode as voltage regulator ● Photo diode ● Logic gates + boolean expression + input and output signals

Click on these social media icons and share it everywhere. so we will meet again with another amazing post best of luck for your exams.

Please Don't Comment Any Promotional or Abousive Comment

1. My physics is weak but my chemistry and mathematics are strong but I am a Hindi medium student . There is nothing in Hindi only English it is my problem please help me

1. OK I WILL SOLVE YOUR PROBLEM SOON.

2. @i_am_army82

3. https://t.me/Jolly_ylloJ
User name: Jolly_ylloJ
Thanks for the material you are providing, helping us