5 Electricity and Magnetism 5.7 Electromagnetic Induction and Faraday’s Law
P2441211
Induction impulse
Measured induction voltage USS versus time. Additionally the evaluation of the peak-to-peak voltage USS = 2.766 V is shown.
Principle A permanent magnet falls with different velocities through a coil. The change in the magnetic flux Φ generates an induced voltage impulse. The induced voltage impulse USS is recorded with a computer interface system. Depending on the polarity of the permanent magnet the induced voltage impulse is negative or positive. Tasks 1. Measurement of the induced voltage impulse USS and the falling magnet's velocity. 2. Evaluation of the induced voltage impulse USS as a function of the magnet's velocity. 3. Calculation of the magnetic flux induced by the falling magnet as a function of the magnet's velocity. What you can learn about ▪ Law of induction ▪ Magnetic flux ▪ Maxwell's equations
Main articles Cobra3 BASIC-UNIT, USB Light barrier, compact Coil, 600 turns, short Tripod base PHYWE Power supply 12V / 2A Software Cobra3 Universal recorder Coil holder Magnet, d 8mm, l 60mm Glass tube,diam 12mm l 300 mm Support rod, stainless steel, l = 600 mm, d = 10 mm
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Cobra4 Experiment - available 2013 Induction impulse with Cobra4 P2441260