PHYSICAClass 12 Physics simulations · Electromagnetic Induction
EMF of a rotating rod
Spin a metal rod about one end in a uniform magnetic field. The free electrons are pushed outward.
What to notice
Every part of the rod moves at a different speed; the average speed is ωL/2.
Key relation
ε = ½ B ω L²
Try this
Double the length. Does the EMF double or quadruple?
What you can change
- Magnetic field: 0.1 to 2 T
- Rod length: 0.2 to 2 m
- Rotation rate: 10 to 3000 rpm
More in Electromagnetic Induction
- Eddy-current braking
- Magnetic flux through a tilted coil
- Magnet through a coil
- Sliding rod generator
- Mutual induction between coils
- Current growth in an RL circuit
- Self-inductance of a solenoid
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