Class 12 Physics simulations · Electromagnetic Induction

Eddy-current braking

Rotate a conducting disc through a magnetic brake and follow the loss of rotational energy.

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What to notice

Induced currents oppose the motion that produces them. Rotational energy becomes heat without mechanical contact.

Key relation

τbrake = −bω; ω = ω₀e^(−bt/I)

Try this

Compare a weak and a strong magnetic brake.

What you can change

• Disc moment of inertia: 0.2 to 2 kg·m²
• Initial angular speed: 1 to 8 rad/s
• Magnetic braking coefficient: 0.1 to 1 N·m·s

More in Electromagnetic Induction

• Magnetic flux through a tilted coil
• Magnet through a coil
• Sliding rod generator
• Mutual induction between coils
• Current growth in an RL circuit
• EMF of a rotating rod
• Self-inductance of a solenoid

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