IMPORTANT QUESTIONS OF NEB -12 PHYSICS WITH PATTERN ANALYSIS
model references
For MCQ, the question can be law-related, figurative analysis, reason oriented
For 5 marks, the question can be )
1 mark questions can be definition, law statement, application, short give a reason.
2 mark questions can be short derivations or analytical give reasons.
3 mark questions can be a numerical or long derivation or figure-related short questions For 8 marks, the possibilities can be 3+5=8,
1+2+2+3=8
I mark questions can be definitions, law statements, short give-a-reason, figure related short questions.
2 mark questions can be give-reason type questions or short derivations.
3 marks can be numerical problems or long derivations.
TIP- COMPLETE FLUID STATICS FIRST. THEN ONLY FINISH ROTATIONAL DYNAMICS AND SHM BECAUSE FLUID STATICS IS A HIGH CREDIT HOUR SUBJECT. THE QUESTION IS COMPULSORY.
- • Define Buoyancy
- • Define Surface tension:
- • Define •Angle of contact, and capillarity and solve the numerical related to them
- • Define the Coefficient Of viscosity
- • Write the Poiseuille•s formula and its application
- • Derive Stokes law and solve numerals related to it.
- • State Equation of continuity
- • State and derive Bernoulli's equation and solve numerical to it.
- • A man standing on the platform near the railway line is sucked in by a fast-moving train. why?
TIP- COMPLETE FLUID STATICS FIRST.
THEN ONLY FINISH ROTATIONAL DYNAMICS AND SHM BECAUSE FLUID STATICS IS A HIGH CREDIT HOUR SUBJECT, THE QUESTION IS COMPULSORY.
• Derive Kinetic energy of rotation of the rigid body
• Define the Moment of inertia and Radius of gyration
• Derive the Moment of inertia of a uniform rod at the center and edge of the rod.
• Establish the relation between Torque and angular acceleration for a rigid body
TIP- COMPLETE FLUID STATICS FIRST.
THEN ONLY FINISH ROTATIONAL DYNAMICS AND SHM BECAUSE FLUID STATICS IS A HICH CREDIT HOUR SUBJECT. THE QUESTION IS COMPULSORY.
• Derive the Energy in SHM and show its variation in the graph.
• Derive the period of vertical oscillation of mass suspended from the coiled spring
• Derive the period of a simple pendulum and numerical related it ( A particle of mass 0.25 Kg oscillates with a period of 2sec. If its greatest displacement is 0.4m. What is its maximum kinetic energy )
• Define Oscillatory motion. Damped oscillation. Forced oscillation. and resonance.
TIP- COMPLETE THE 2ND LAW OF THERMODYNAMICS AND TRY TO UNDERSTAND THE SOURCE. SINK. AND WORK DONE DIAGRAM.
* State the Second law of thermodynamics Define Heat engine.
* Explain the working of Otto cycle(petrol engine). Diesel cycle; Carnot cycle.(
NO MATHEMATICAL DERIVATION. ONLY PROCESS AND GRAPH ) Explain the working of the Refrigerator Define Entropy and disorder.
* Solve the numerical involving efficiency of the heat engine
* Define Internal energy and what factor changes the internal energy of the engine.
* State the First law of thermodynamics and solve the numerical related to it. Define the Thermodynamic processes: Adiabatic. isochoric. isothermal. and isobaric
* Derive the relation between the Heat capacities Of an ideal gas at constant pressure and RELATION )
* Derive the work done for Isothermal and Adiabatic processes for an ideal gas. Can Work be done by the system Without changing its Volume?
TIP FOR OPTICS - COMPLETE THE FIRST CHAPTERS LIKE INTERFERENCE. DIFFRACrlON AND ACOUSTIC PHENOMENON BECAUSE 8 MARKS CAN BE ASKED FROM THESE CHAPTERS.
* Define Interference and how it describes the conservation of energy. Define Coherent sources
* Derive Young's double slit experiment. or show the spaces between consecutive dark and bright fringes are equal in size and solve the numerically related fringe width. Define. Diffraction
* Cive two differences between fringes formed in single slit diffraction and Young's double slits experiment
* Derive the Diffraction from a single slit derive the condition for secondary maxima and minima and solve the numerical related to it
* Define Diffraction grating and solve the numerical related to it and Define the Resolving power of optical instruments.
* Define Polarization
* Derive Brewster's law and solve numerical related to Calculating the polarizing angle for light traveling from Water with a refractive index of 133 to a glass with a refractive index of 1.53.) Define Polaroid.
TIP FOR WAVE - COMPLETE ACOUSTIC PHENOMENON AND WAVES IN PIPES AND STRINGS
* What is Doppler's effect? DERIVE FORMULA FOR VARIOUS CASES OF SOURCE AND OBSERVER. FOR EXAMPLE: Deduce the formula for the apparent frequency of a sound wave when the source is moving towards the stationary listener. AND SOLVE NUMERICAL RELATED TO IT
* A car traveling at 20 ms sounds its horn which has a frequency Of 600HZ. What frequency is heard by a stationary observer as the car approaches? Velocity Of sound =340m/s.
* DEFINE Intensity: loudness. quality and pitch of the sound
* Explain in brief about Pressure amplitude and its value in nodes and antinodes and its relation with the loudness of sound. DERIVE Stationary waves in closed and open pipes
* DEFINE End correction in pipes and why we take end correction into consideration.
* DERIVE of transverse waves along a stretched string
* STATE the Laws of vibration Of fixed string. and solve numerical related to it. Explain Newton:s law and Laplace•s correction about the velocity of sound in the gas.
* Explain the Effect of temperature. pressure. density and humidity on the velocity of sound.
TIP- COMPLETE THE FIRST CHAPTERS LIKE ALTERNATING CURRENT AND
MAGNETIC FIELD BECAUSE 8 MARKS CAN BE ASKED FROM THESE CHAPTERS.
• DEFINE•Feakand RMS value ofAccurrentand voltage. IMPEDANCE. ADMITTANCE
• DERIVE AC through a resistor. a capacitor and an inductor(LCR). CR & LA CIRCUIT with Phasor diagram. SOLVE THE NUMERICAL( A series LCR circuit is connected to an ac power supply with 120V.60Hz. If R-500hm C-8uF and L•O.3H. what is the average power dissipated? )
• DEFINE Series resonance. quality factor power factor
• DERIVE power in AC circuits:
• DEFINE magnetic flux
• SOLVE THE NUMERICALSRELATED Forceon moving charge& Forceonaconductor
• DERIVE Torque on the rectangular coil. Moving coil galvanometer
• EXPLAIN Hall effect
• STATE Biot and Savart law and explain its application to
(i) a circular coil (center and axis ) (ii) a long straight conductor a long solenoid
• STATE Ampere•s law and its applications to
(ii) a straight solenoid (ii) a toroidal solenoid
• DERIVE Force between two parallel conductors carrying current- definition of the ampere
TIP. COMPLETE THE FIRST CHAPTERS LIKE ALTERNATING CURRENT AND
MAGNETIC FIELD BECAUSE 8 MARKS CAN BE ASKED FROM THESE CHAPTERS.
• STATE Kirchhorrs law
• EXPLAIN Wheatstone bridge circuit
EXPLAINMeter bridge
• DEFINE potentiometer AND ITS PRINCIPLE
• DESCRIBE ITS APPLICATION comparison of ernf. a measurement of internal resistances of a cell
• DEFINE :Superconductors: Perfect conductors Convert galvanometer into voltmeter and ammeter
STATE Seebeck effect. Peltier effect & Thomson's effect Define Thermocouple.
EXPLAIN Variation of thermoelectric error. with temperature
TIP- COMPLETE THE FIRST CHAPTERS LIKE ALTERNATING CURRENT AND
MAGNETIC FIELD BECAUSE 8 MARKS CAN BE ASKED FROM THESE CHAPTERS.
• DEFINE. Electromagnetic Induction
• STATE Faradays laws OF ELECTROMAGNETIC INDUCTION
• STATE Lenz'S law AND EXPLAIN HOW IT CONSERVES THE ENERGY.
• DEFINE THE TERMS Eddy currents. Self-inductance and mutual inductance
• DERIVE Energy stored in an inductor
• DEFINE Transformer & ITS TYPES. SOLVE IT'S NUMERICAL
• DEFINE THE TERMS: Relative permeability: Susceptibility
• EXPLAIN Hysteresis loop coercivity and retentivity )
• DIFFERENTIATE: Dia.•para- and ferromagnetic materials
TIP- COMPLETE THE FIRST CHAPTER RADIOACTIVITY AND ELECTRONS BECAUSE 8 MARKS CAN BE ASKED FROM THESE CHAPTERS.
* DEFINE. Radioactivity and nuclear reaction
* DIFFERENTIATE Alpha-particles: Beta-particles, Gamma rays
* STATE Lawsof radioactive disintegration AND DERIVE N=NoenÄtand Half-life DEFINE mean-life and decay constant AND SOLVE NUMERICAL
* The Isotope Ra•226 undergoes decay with a half-life of 1620 years, What is the activity or gram Of Ra- 226? (Avogadro number—6.023x10h23/m01)
* DEFINE Geiger-Muller Tube & Carbon dating
* LIST THE Medical use Of nuclear radiation and possible health hazard.
• DERIVE Milikan•soil drop experiment AND SHORT QUESTIONS LIKE WHICH OIL IS USED. WHY OIL ts USED. APPLICATION OF X-RAY. WHY NOT WATER IS USED. What would be the effect on Millikan•s Oil drop experiment? Of performing it in a vacuum? SOLVE NUMERICALS RELATED TO IT.
* DEFINE QUANTIZATION OF CHARGE
* DERIVE Motion of electron beam in electric and magnetic fields. SOLVE NUMERICAL
* DERIVE Thomson's experiment to determine the specific charge of electrons
TIP- COMPLETE THE FIRST CHAPTER RADIOACTIVITY AND ELECTRONS BECAUSE 8 MARKS CAN BE ASKED FROM THESE CHAPTERS.
* DERIVE Einstein•s photoelectric equation AND SOLVE NUMERIC ALS
* DEFINE THRESHOLD FREQUENCY.THRESHOLDWAVELENGTH. WORK FUNCTION STOPPING POTENTIAL
* DESCRIBE THE MILLIKAN EXPERIMENT ABOUT MeasurementofPlank's constant DEFINE P.N Junction AND DESCRIBE ITS FORWARD AND REVERSE BIASED CHARACTERISTICS.
* DEFINE Full wave rectification AND EXPLAIN ITS WORKING MECHANISM. EXPLAIN Logic gates; NOT. OR. AND. NANO and NOR.
* STATE Bohr'S theory of hydrogen atom AND DERIVE RADIUS AND ENERGY OF ELECTRON
* DEFINE: Excitation and ionization potentials
• SOLVE THE NUMERICAL OF HYDROGEN the shortest wavelength in the
Lyman series is 918. Calculate the longest wavelength in the same series,)
* STATE De Brogue Theory & HEISENBERC Uncertainty principle
* DEFINE X-rays AND EXPLAIN ITS Nature AND EXPLAIN THE COOLIDCETUBE OF X-RAY production; uses OF X-RAY. SOLVE NUMERICALly RELATED TO XRAY X-ray tube operated at 50 KV produces heat at the target at the rate of 740 watts. if 0.5% energy Of incident electron is converted into X•rays. find the number Of electrons striking the target per second )
TIP- COMPLETE THE FIRST CHAPTERS RADIOACTIVITY AND ELECTRONS
BECAUSE 8 MARKS CAN BE ASKED FROM THESE CHAPTERS.
• DEFINEX.raysANOEXPLAlN ITS Nature AND OFX-RAY production: uses OF X-RAYSOLVE NUMERICAL RELATED TO XRAY TUBE. (An x-ray tube operated at 50 KV produces heat at the target at the rate Of 740 watts. If 0-5% energy or incident electron is converted into X-rays. find the NOE striking the target per second )
• EXPLAIN Bragg's law. AND SOLVE NUMERICAL
• DEFINE Surface waves: Rayleigh and Love waves Internal Waves: S and P-waves
• DESCRIBE Wave patterns of the Gorkha Earthquake 2015
• DEFINE Gravitational Wave. Nanotechnology. Higgs Boson
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