CLASS 12 PHYSICS PRACTICAL | METRE BRIDGE EXPERIMENT TO FIND RESISTANCE & RESISTIVITY | CBSE 2025

Описание: 🎓 Class 12 Physics Practical – Metre Bridge Experiment
In this video, we perform the Metre Bridge experiment to determine the resistance of a given wire and calculate the resistivity (specific resistance) of its material. This is one of the most important practicals for Class 12 CBSE/State Board Physics, especially useful for board exam preparations.

📌 Experiment Name: To determine the resistance of a given wire using a Metre Bridge and hence find the resistivity of its material.

📌 Apparatus Used:

Metre bridge

Galvanometer

Known resistance box

Connecting wires

Rheostat

Key

Given wire (unknown resistance)

📌 Learning Outcomes:
✔ Understand how to use a metre bridge to find unknown resistance
✔ Apply Ohm’s Law and principle of Wheatstone Bridge
✔ Calculate the resistivity using the formula:
  ρ = (R × A) / L
  where R = Resistance, A = Area of cross-section, L = Length of wire

📌 Also Includes:
🔹 Step-by-step procedure
🔹 Circuit diagram
🔹 Observations & Calculations
🔹 Viva questions with answers for board exam

📚 Best for: CBSE Class 12 | GSEB | HSC | Board Practical Exam 2025

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