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Faraday's experiment (Posted on 2006-10-20) Difficulty: 3 of 5
January 12th in 1832 Michael Faraday did the following experiment in London:

He placed two copperplates in the Thames river at opposite ends of a bridge crossing at 300m apart. He then connected these copperplates with insulated wires to a voltage meter.
He measured a 19mV voltage. Magnetic field in London is measured to be 43µT (43*10^-6 T) and inclination is 71 degrees.

Why did Faraday's meter measure a voltage and what was the velocity of the water in the river Thames at that time?

No Solution Yet Submitted by atheron    
Rating: 4.0000 (1 votes)

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re: Answers | Comment 6 of 9 |
(In reply to Answers by vswitchs)

Thanks for that info.

Re the rotation of the plates, I had that thought in mind, but I was also somewhat thinking that there might have been a difference due to a different orientation across the flux.  But you explanation is quite clear.

  Posted by brianjn on 2006-10-22 21:17:48

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