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demonstrations:5_electricity_and_magnetism:5k_electromagnetic_induction:magnets_through_copper_tube:start [2019/05/15 22:49] demoroom |
demonstrations:5_electricity_and_magnetism:5k_electromagnetic_induction:magnets_through_copper_tube:start [2019/05/15 22:55] demoroom |
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===== Description ===== | ===== Description ===== | ||
- | Consists simply of a copper tube and a powerful cylindrical magnet with an outer diameter just a bit smaller than the inner diameter of the tube. | + | Consists simply of a copper tube and a powerful cylindrical magnet with an outer diameter just a bit smaller than the inner diameter of the tube. There are three copper tubes available in the demo room. Their lengths aren't exactly the same but are close to 50cm. |
+ | |||
+ | A smaller-diameter copper tube with a slit is also available, as well as a pair of aluminum tubes (which work, but not as well because the conductivity of aluminum is lower) and a long solenoid (which seems like it should work, but essentially doesn't due to the way the induced currents cancel). | ||
===== Purpose ===== | ===== Purpose ===== | ||
- | Demonstrate the induction of [[wp<eddy current|eddy currents]]. Demonstrate induced current/ magnetic fields. Demonstrate Lenz's law/ Faraday's law. | + | Demonstrate the induction of [[wp>eddy current|eddy currents]]. Demonstrate induced current/ magnetic fields. Demonstrate Lenz's law/ Faraday's law. |
===== Apparatus ===== | ===== Apparatus ===== | ||
* Copper Tube (Optional: Multiple copper tubes, copper tube with slit) | * Copper Tube (Optional: Multiple copper tubes, copper tube with slit) | ||
- | * [demonstrations:5_electricity_and_magnetism:5g_magnetic_materials:magnets:start|1" Neodymium magnet]] | + | * [[demonstrations:5_electricity_and_magnetism:5g_magnetic_materials:magnets:start|1" Neodymium magnet]] |
===== Setup ===== | ===== Setup ===== |