IMPORTANT TOPICS FOR CLASS12 PHYSICS FOR BOARD EXAM


IMPORTANT TOPIC FOR CLASS12TH PHYSICS CBSE BOARD EXAMINATION:

Subject :  PHYSICS    By- Mamta Singh 


Ch.-1


  1. Electric flux

  2. Force and Torque on the electric dipole.

  3. Electric field on the axial and equatorial line. 

  4. Statement of Gauss-Theorem.

  5. Applications of Gauss- Theorem,all three applications of Gauss theorem especially charged spherical shell.


Ch.-2


  1. Capacitance and factor’s affecting capacitance. 

  2. Energy stored in a capacitor and its energy density( formula only).

  3. Capacitance of a parallel plate capacitor with a dielectric slab placed in between. (IMPORTANT)

  4. DRAW EQUIPOTENTIAL SURFACE TO A POINT CHARGE,LINE CHARGE,PLANE ELECTRIC FIELD AND DUE TO A ELECTRIC DIPOLE.

  5. Equi-potential surface and its properties.

  6. Relation between electric field and electric potential. 

  7. Effect on various parameters when a dielectric slab is introduced b/w the plates of parallel plate capacitor.

  8. Principe of parallel plate capacitor.

  9. Potential at any general point of electric dipole.


Ch.3 (7 marks)


  1. Drift velocity.

  2. Relation between current and drift velocity.

  3. Proof of Ohm’s law & ohms law in vector form.(IMPORTANT)

  4. Wheatstone bridge( NUMERICAL)

  5. Internal resistance and factors affecting it and the three graphs for the cell or a battery. 

  6. Equation of charging and discharging and NUMERICAL on it ( IMPORTANT)

  7. Kirchhoff’s rules and Numerical's on it.(IMPORTANT)


Ch. 4


  1. Motion of a charge particle in the uniform magnetic field when velocity is perpendicular to the magnetic field. (CIRCLE,RADIUS, TIME PERIOD, AND FREQUENCY)

  2. Expression for the torque on a current carrying loop

  3. Force acting on a current carrying wire and Force acting on a charge particle in uniform magnetic field.

  4.  Moving coil galvanometer and conversion of galvanometer into ammeter and voltmeter.(IMPORTANT)

  5. Current and voltage sensitivity of moving coil galvanometer.

  6. Application’s of Biot-savart’s law magnetic field at centre and axis of a current carrying loop.( IMPORTANT)

  7. Biot-savarts law in vector form. 

  8. Ampere circuital law and its proof.

  9. Applications of Ampere circuital law,  (solenoid)

  10. Force between two parallel current carrying conductors. (IMPORTANT).


Ch. 5


  1. Angle of dip,horizontal component and angle of declination. (IMPORTANT)

  2. Horizontal and vertical component of magnetic field. (IMPORTANT)

  3. Magnetisation.

  4. Magnetic intesntity and magnetic susceptibility. (IMPORTANT)

  5. Relative permeability.

  6. Difference between temporary magnet and permanent magnet. 

  7. Properties of Dia,para and ferro.(IMPORTANT)

  8. CURRENT CARRYING SOLENOID EQUIVALENT AS A BAR MAGNET(IMPORTANT). 



     By- Mamta Singh 


Ch. 6


  1. Faraday’s law’s of EMI.

  2. Lenz’s law  and conservation of energy and eddy current &there application.

  3. Expression for motional emf for a linear conductor or a rotating wire.

  4. Expression for coefficient of self and mutual induction.

  5. Energy stored in an inductor. 

  6. Magnetic flux and its S.I. unit.

  7. Transformer.( IMPORTANT)


Ch. 7


  1. Show that in an inductor voltage leads the current by  90⁰ 

  2. Show that in a capacitor current leads the voltage by 90⁰

  3. Expression for impedance in LCR circuit and its phasor diagram.

  4. Expression for power in LCR circuit. 

  5. Define Resonance and condition for it.

  6. Plot the graph of current with angular frequency. 

  7. AC generator.

  8. Faradays laws of EMI .


Ch. 8  (3 marks)



  1. Sketch of EM wave.

  2. Equations for electric and magnetic vectors AND NUMERICAL ON THEM TO COMPARE THE EQUATIONS. 

  3. Properties and uses of EM waves.

  4. Transverse nature of em-waves.

  5. Learn table from the NCERT Book(IMPORTANT)


Ch. 9  ( 7 marks)


  1. Relations for refraction along a single refracting surface. 

  2. Lens maker’s formula.

  3. Combined focal length of the two thin lens in contact.(IMPORTANT)

  4. Prism formula.(IMPORTANT)

  5. Condition for minimum deviation.

  6. Critical angle and TIR.

  7. Applications of TIR OPTICAL FIBRE( IMPORTANT)

  8. Astronomical telescope, compound microscope.(IMPORTANT)

  9. Reflecting type telescope and its advantages.( IMPORTANT)

  10. NUMERICAL ON LENS MAKERS  FORMULA. ( IMPORTANT)

  11. Power of a lens and its expression with SI unit.



Ch. 10 ( 6 marks)


  1. Huygen’s theory. 

  2. Wavefront and its types.

  3. Proof of snell’s law and law of reflection on the basis of HUYGENS THEORY.( IMPORTANT)

  4. Condition for constructive and destructive interference for YDSE.( IMPORTANT)

  5. Expression for resultant intensity and resultant amplitude for YDSE.

  6. single slit experiment.

  7. RELATION BETWEEN PATH DIFFERENCE AND PHASE DIFFERENCE ( IMPORTANT)

  8. Coherent sources and conditions for obtaining coherent sources.

  9. PLOT ( GRAPH) OF INTERFERENCE  AND DIFFRACTION WITH PATH DIFFERENCE OR PHASE DIFFERENCE. ( IMPORTANT)

  10. Prove that with the change in medical there is no change in the frequency of light ( IMPORTANT)


Ch. 11


  1. Einstein photo-electric equation AND ITS EXPLANATION 

  2. Define threshold frequency and stopping potential.

  3. Laws of photo electric emission.

  4. Slope of frequency  with slopping potential graph.( IMPORTANT)

  5. Variation of slopping potential with intensity and frequency graph.

  6. De-broglies equation and concept of dual behaviour. 

  7. Properties of photons.

  8. FAILURE OF WAVE THEORY TO EXPLAIN PHOTO ELECTRIC EMISSION ( IMPORTANT)



Ch. 12


  1. Bohr’s postulates.(IMPORTANT)

  2. Geiger – Marsden experiment. 

  3. Expression for Bohr’s radius.( IMPORTANT)

  4. Expression for Energy of Hydrogen atom.

  5. Expression for Rydberg’s constant. 

  6. Spectral series of hydrogen SND NUMERICAL ON IT

  7. Ionisation energy,ground state and excited state AND NUMERICAL ON IT.

  8. Distance of closest APPROACH AND NUMERICAL ON IT.( IMPORTANT)

  9. IMPACT PARAMETER.( IMPORTANT)


Ch. 13


  1. Mass-defect and Binding energy and NUMERICAL on it ( IMPORTANT)

  2. Composition of nucleus.

  3. Expression for the density of nucleus.(IMPORTANT)

  4. PLOT OF POTENTIAL ENERGY OF NUCLEONS WITH THE SEPARATION BETWEEN THEM ( IMPORTANT)

  5. Mass defect and Einstein mass energy relation.

  6. NUMERICAL ON NUCLEAR FISSION AND FUSION.

 

                   Ch 14

  1.  Pn junction under forward and reverse biased WITH THEIR  I- V CHARACTERISTIC CURVE.

  2. drift , diffusion and barrier potential.

  3. Charge depletion region AND WIDTH OF CHARGE DEPLETION REGION

  4. Energy bands  DIAGRAMS and band energy gap.

  5. Energy level diagrams of of n and p type semiconductor

  6. DONAR ENERGY LEVEL AND ACCEPTOR ENERGY LEVEL DEFINATION AND DIAGRAMS ( IMPORTANT)

  7. half wave rectifier and full wave rectifier ( IMPORTANT )

     







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