01
Determine the Resistivity of Two or Three Wires
Determine the resistivity of two or three wires by plotting a graph between potential difference (V) and current (I).
A focused collection of Class 12 CBSE Physics practical experiments covering electricity, resistance, metre bridge, Ohm’s law, lenses, prisms, graphs, observations, calculations and practical-exam preparation.
Practical work is an essential part of CBSE Class 12 Physics. It develops experimental skills and helps students connect theoretical concepts with real measurements, graphs and observations.
This eduPhysics Master Hub brings together important Class 12 Physics experiments in one place. Use the experiment guides to revise the aim, apparatus, theory, procedure, observations, calculations, graphs, result, precautions and viva questions associated with each practical.
Determine the resistivity of two or three wires by plotting a graph between potential difference (V) and current (I).
Study the relationship between potential difference and current and use the V–I graph to investigate resistance.
Use a metre bridge experiment to verify the laws of combination of resistances in series and parallel.
Determine the value of an unknown resistance using the metre bridge arrangement and the principle of the Wheatstone bridge.
Determine the focal length of a convex lens by plotting graphs between u and v and between 1/u and 1/v.
Determine the angle of minimum deviation for a given prism by plotting a graph between the angle of incidence and angle of deviation.
For each experiment, students should be comfortable with the following components:
The hub brings together selected Class 12 CBSE Physics practical experiments covering electricity, resistance, metre bridge and ray optics.
Graphs allow experimental relationships to be represented visually and can be used to determine physical quantities from slopes, intercepts or characteristic points.
The collection includes an Ohm’s law V–I experiment, resistivity determination using a V–I graph, and two metre bridge experiments involving resistance.
The optics section currently includes the convex-lens focal-length experiment and the prism minimum-deviation experiment.
Start by understanding the principle and apparatus. Then revise the procedure, observation table, graph, calculations, result and precautions. Finally, practise explaining the experiment aloud and answering likely viva questions.
Use the eduPhysics practical guides to connect Physics theory with real experimental measurements, graphs and observations. Revisit each experiment before your laboratory sessions and practical examination.