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Activity 12.7 — Electric Motor
NCERT Activity 12.7: Understand how an electric motor works — a current-carrying coil in a magnetic field rotates due to forces, with a commutator ensuring continuous rotation.
How To Perform
1
Assemble the Motor
Set up the rectangular coil, magnet, commutator, and brushes.
2
Observe Forces
See how opposite forces on coil sides create a torque.
3
Watch it Rotate
Observe continuous rotation as the commutator reverses current.
4
Understand Commutator
Learn why the split ring commutator is essential.
⚠️ Safety Notes
- •Keep fingers away from rotating parts.
- •Use low voltage to control the motor speed.