CBSE 12 Physics · Lab
Practicals, Activities and Project Work
CBSE Class 12 Physics practical viva voce and laboratory-skill practice: electrical experiments, meter bridge, galvanometer conversion, sonometer, optics experiments, diode characteristics, component identification, activities, graph work, project reasoning, precautions, and viva responses.
Test yourself
A focused, distraction-free run through 40 multiple-choice questions. Hints if you need them; your score at the end.
Difficulty guide
The label describes the problem, not your ability.
1/5 - Foundational
Warm-up setup; checks one basic idea.
2/5 - Routine exam skill
Normal syllabus skill; usually one main rule or interpretation.
3/5 - Standard multi-step
Exam-style problem with multiple steps or a common trap.
4/5 - Hard exam skill
High-end exam problem; combines methods carefully.
5/5 - Challenge
Stretch problem beyond normal exam pressure.
Topic Lab.1
Electrical Measurements and Meter Bridge
V-I graphs, resistance per unit length, Ohm's law verification, series-parallel combinations, and meter bridge balance.
Item 1
Open
Item 2
Open
Item 3
Open
Item 4
Open
Item 5
Open
Item 6
Open
Item 7
Open
Item 8
Open
Item 9
Open
Item 10
Open
Topic Lab.2
Galvanometer, Sonometer and Transformer Activities
Half-deflection method, galvanometer conversion, AC mains frequency with sonometer, inductor core effect, and transformer turns ratio.
Item 1
Open
Item 2
Open
Item 3
Open
Item 4
Open
Item 5
Open
Item 6
Open
Item 7
Open
Item 8
Open
Item 9
Open
Item 10
Open
Topic Lab.3
Optics Experiments
Concave mirror and convex lens focal length, lens combinations, glass slab, prism minimum deviation, travelling microscope, and refractive index methods.
Item 1
Open
Item 2
Open
Item 3
Open
Item 4
Open
Item 5
Open
Item 6
Open
Item 7
Open
Item 8
Open
Item 9
Open
Item 10
Open
Topic Lab.4
Diode, Components, Multimeter and LDR Activities
p-n junction diode I-V curve, component identification, multimeter continuity checks, unidirectional conduction, LED/diode activity, and LDR current variation.
Item 1
Open
Item 2
Open
Item 3
Open
Item 4
Open
Item 5
Open
Item 6
Open
Item 7
Open
Item 8
Open
Item 9
Open
Item 10
Open
Topic Lab.5
Practical Record, Project Work and Viva Skills
Official record requirements, activities, apparatus familiarity, graph scale choice, error analysis, project variables, precautions, and viva communication.
Topic Lab.6
Resistivity, Figure of Merit and Circuit Activities
Resistivity from V-I graphs, figure of merit, potential drop along a wire, household-circuit assembly, multimeter use, and open-circuit correction.
Item 1
Open
Item 2
Open
Item 3
Open
Item 4
Open
Item 5
Open
Item 6
Open
Item 7
Open
Item 8
Open
Item 9
Open
Item 10
Open
Topic Lab.7
Auxiliary-Lens, Liquid and Wave-Optics Activities
Convex mirror and concave lens experiments using a convex lens, liquid refractive-index methods, glass-slab lateral deviation, thin-slit diffraction, and lens combinations.
Item 1
Open
Item 2
Open
Item 3
Open
Item 4
Open
Item 5
Open
Item 6
Open
Item 7
Open
Item 8
Open
Item 9
Open
Item 10
Open
Topic Lab.8
Official File Completion, Projects and Inclusive Viva
Practical-file completeness, official evaluation expectations, suggested investigatory projects, variable control, transformer and LDR project graphs, and apparatus familiarity.
Item 1
Open
Item 2
Open
Item 3
Open
Item 4
Open
Item 5
Open
Item 6
Open
Item 7
Open
Item 8
Open
Item 9
Open
Item 10
Open