NIOS Physics (312) is the Senior Secondary Physics course offered by the National Institute of Open Schooling (NIOS).
Note: Students should refer to the latest official NIOS Physics (312) course material and laboratory manual for current syllabus, practical and examination-related information.
Complete practical preparation for NIOS Senior Secondary Physics (312). Explore experiment-wise procedures, principles, apparatus, observations, calculations, graphs, precautions and viva preparation.
This master hub organizes the NIOS Physics practical experiments into measurements and mechanics, sound and optics, and electricity and magnetism. Use it as a study guide alongside the official NIOS practical manual and the instructions issued for your examination session.
The NIOS Class 12 Physics practical syllabus helps students develop experimental skills and understand the physical principles behind laboratory activities. Experiments involve precision measurements, verification of physical laws, optical measurements, electrical circuits, graph plotting and interpretation of experimental results.
| Practical section | Experiment numbers | Key topics |
|---|---|---|
| Section A | 1–9 | Measurements, mechanics and thermal physics |
| Section B | 10–19 | Sound, waves and optics |
| Section C | 20–29 | Electricity, magnetism and semiconductor devices |
This section focuses on measurement instruments, mechanical laws, oscillations, elasticity, heat transfer and fluid flow.
EXPERIMENTS 1–9Use Vernier calipers to measure the internal diameter and depth of a cylindrical container. Calculate its capacity and verify it with a graduated cylinder.
Determine the diameter of a thin wire using a screw gauge. Learn to calculate least count, zero correction and mean diameter.
Use a spherometer to measure the sagitta of a concave mirror and calculate its radius of curvature.
Measure the time period for different pendulum lengths. Plot length against the square of the time period and determine the length of a seconds pendulum.
Determine the resultant of two forces using the parallelogram law and compare it with the experimental balancing force.
Record the cooling of hot water at regular intervals and plot a graph to investigate the relationship between cooling time and temperature difference.
Mix a heated solid with water in a calorimeter. Use the principle of heat exchange to calculate the specific heat capacity of the solid.
Measure the extension of a helical spring for different loads. Plot a load-extension graph and determine the spring constant.
Record the time taken for water to flow through successive fractional volume intervals and plot the required graph to study the rate of flow.
This section develops practical knowledge of resonance, sound waves, focal length, refraction, prism deviation and optical instruments.
EXPERIMENTS 10–19Find resonance positions using a tuning fork and resonance column. Calculate the wavelength and velocity of sound in air.
Use first and second resonance positions in a resonance tube to compare the frequencies of two tuning forks.
Investigate the effect of tension on the resonating length of a sonometer wire and determine its mass per unit length.
Obtain object and image distances for a concave mirror. Plot a graph between reciprocal object distance and reciprocal image distance to determine focal length.
Measure object and image distances for a convex lens. Plot a graph between 1/u and 1/v and determine focal length.
Form an image using a convex lens and use the prescribed optical arrangement to determine the focal length of a convex mirror.
Combine a concave lens with a suitable convex lens and use the equivalent focal length to calculate the focal length of the concave lens.
Plot the angle of incidence against the angle of deviation. Determine the angle of minimum deviation and calculate the refractive index of the prism.
Use a concave mirror and a single pin to compare the refractive indices of two transparent liquids through the prescribed method.
Arrange the objective and eyepiece for normal adjustment. Determine the magnifying power of the telescope.
Explore resistance, electrical measurements, potentiometer, electromagnetic induction, RC circuits, semiconductor characteristics and magnetic fields.
EXPERIMENTS 20–29Use the ammeter-voltmeter method to verify the laws of series and parallel combinations of resistors.
Measure the balancing lengths for two primary cells and compare their EMFs using a potentiometer.
Determine the resistance of a given wire using a metre bridge and calculate its resistivity from its dimensions.
Measure the balancing lengths under open-circuit and loaded conditions and calculate the internal resistance of the cell.
Use a suitable series resistance and AC voltmeter to determine the resistance and inductance of a coil using the prescribed circuit arrangement.
Study the charging or discharging response of an RC circuit and determine the time constant from experimental readings.
Plot the forward-bias current-voltage characteristic curve of a PN junction diode and determine its static and dynamic resistance.
Plot the input and output characteristics of an NPN transistor in common-emitter mode and determine current gain and voltage gain as prescribed.
Trace magnetic field lines for two orientations of a bar magnet and locate neutral points.
Use the half-deflection method to find the galvanometer's resistance and convert it into a voltmeter using an appropriate series resistance.
The published NIOS practical guidelines describe formative and summative assessment. Students should follow the examination-session instructions provided by NIOS and their Accredited Institution.
| Assessment component | Marks | What students should prepare |
|---|---|---|
| Formative assessment | 10 | Practical contact sessions, participation, records and activities |
| Summative practical assessment | 10 | Practical activities and viva voce, according to the applicable guidelines |
| Total practical | 20 | Continuous preparation and final practical examination |
Read the physical law or principle behind the experiment. Understand why each step is necessary rather than memorizing the procedure alone.
Learn the correct use of measuring instruments, optical benches, electrical circuits and laboratory equipment.
Practise observation tables, least count, corrections, significant figures, unit conversions and calculations.
Learn to select suitable scales, label axes, plot points, draw best-fit lines and determine slopes correctly.
Review formulas, apparatus, experimental errors, precautions, definitions and the physical significance of the results.
Keep the practical record organized with clear diagrams, observations, calculations and results as instructed by your study centre.
Use official course materials to confirm the prescribed experiment procedures, laboratory requirements and current assessment instructions.
Access the NIOS Physics course-material page and check for the available practical manual.
Visit NIOS Physics 312 resources →Refer to the published practical guidelines for experiment lists and assessment information.
Open practical guidelines PDF →Check relevant learner notifications for practical examination schedules and session-specific updates.
View learner notifications →The published practical guidelines list 29 experiments across three sections: measurements and mechanics, sound and optics, and electricity and magnetism. Check the current session's official manual for any revisions.
The published assessment scheme allocates 20 marks to practical work, comprising formative and summative assessment components. Refer to the applicable examination guidelines for details.
A typical practical record includes the aim, apparatus, theory or principle, labelled diagram, procedure, observations, calculations, result and precautions. Follow the format specified by your study centre.
Yes. Several listed experiments involve graph plotting and interpretation. Practise drawing graphs with suitable scales, correctly labelled axes and accurate experimental points.
No. Some experiments overlap, but the prescribed experiment lists, practical instructions and assessment requirements may differ. Prepare according to the NIOS Physics 312 practical syllabus.
Study the underlying principle, formulas, apparatus, least count, precautions, sources of error and interpretation of results for each experiment. Practise explaining the experiment in your own words.
Explore Physics concepts, practical experiments, diagrams, formula sheets and exam-oriented learning resources with eduPhysics.
Explore eduPhysicsExplore these additional eduPhysics resources to strengthen your understanding of important Physics practical concepts.
Explore these optics experiments to understand refraction, light paths and the measurement of optical properties.
Strengthen your understanding of precision measurements, screw gauge readings, zero error and numerical applications in Physics practicals.
Explore these related eduPhysics resources to strengthen your understanding of simple pendulum motion, oscillations and elastic properties relevant to NIOS Physics preparation.
Use these important eduPhysics resources for additional practical preparation, numerical practice and conceptual reinforcement for NIOS Class 12 Physics.
Effective practical preparation requires more than reading the experiment procedure. Students should understand the apparatus, experimental principle, observations, calculations, graphs, sources of error and precautions associated with each experiment.
eduPhysics Tip: While preparing each practical, study the experiment together with its principle, apparatus, procedure, observation table, calculations, graph, result, errors, precautions and viva questions. This approach helps build complete practical understanding instead of memorising isolated steps.
Viva questions test whether you understand the Physics behind an experiment rather than simply memorising its procedure. Prepare questions related to the principle, apparatus, formula, measurements, graphs, errors, precautions and experimental results.
Practical Exam Tip: Do not memorise viva answers without understanding the experiment. If you understand the principle, apparatus, measurements, calculations and graph, you can answer a wide range of practical viva questions confidently.
Use this checklist to make sure you are prepared for every stage of the NIOS Physics practical examination.
Final Check: Before the practical examination, make sure you can explain not only what you are doing, but also why each step is performed.
Begin by understanding the principle, apparatus, procedure, observations, calculations, graph, result, sources of error and precautions for each practical. Practise explaining the experiment in your own words and revise related viva questions.
Prepare questions related to the principle of the experiment, apparatus, least count, formula, units, observations, calculations, graphs, errors, precautions and the final result.
The least count represents the smallest measurement that an instrument can reliably measure. Knowing the least count helps students record observations correctly and understand the precision of their measurements.
Graphs help students study the relationship between physical quantities and can be used to determine quantities such as slope, intercept or other experimental parameters.
Precautions help minimise experimental errors and improve the reliability and accuracy of the final result.
Students should understand the procedure rather than simply memorising it. Understanding why each step is performed makes it easier to carry out the experiment correctly and answer viva questions confidently.
The eduPhysics NIOS Class 12 Physics Practical Experiments Master Hub provides links to related practical resources covering areas such as current electricity, optics, measurements, oscillations and elasticity.
Use the eduPhysics NIOS Physics Practical resources to study experiments systematically and build confidence in practical work. Explore the relevant experiment, understand the underlying Physics, practise observations and calculations, revise graphs and precautions, and prepare the associated viva questions.
Start with the practical experiments listed above and use the related eduPhysics resources whenever you need additional explanations, numerical practice or conceptual support.
Keep this NIOS Physics Practical Experiments Master Hub as your central reference while preparing for the Class 12 Physics practical examination.
Explore additional eduPhysics resources to support your NIOS Class 12 Physics preparation alongside practical work.
Use the practical resources together with your NIOS Physics study materials to strengthen both conceptual understanding and experimental skills.