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Activity 12.3 — Magnetic Field of a Current-Carrying Circular Loop
NCERT Activity 12.3: Explore the magnetic field produced by a current-carrying circular loop. Observe how field lines pass through the centre.
How To Perform
1
Form the Loop
Create a circular loop of wire and connect it to a battery.
2
Observe Field
Pass current and observe the magnetic field pattern — similar to a bar magnet.
3
Increase Current
Double the current and observe the stronger field at the centre.
4
Analyse Relationship
Understand how B ∝ I/r for a circular loop.
⚠️ Safety Notes
- •The wire may heat up — do not touch while current is flowing.
- •Use low-voltage batteries only.