Understanding the Amplitude of Current in Halliday's Book

  • Thread starter kent davidge
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In summary, the conversation discusses the confusion over the units in an answer for a question in Halliday's book regarding voltage. The speaker also mentions their difficulty in understanding why the current was not expressed as a function of time, despite learning about Faraday's formula. The other person explains that the amplitude is not time dependent and the formula only includes the amplitude of the current, io.
  • #1
kent davidge
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I found this answer for an question of the Halliday's book but the units m².T.rad/s in the answer don't make sense with voltage. (sorry my poor english)
And I cannt understand why they haven't expressed the current as a function of time.

2ufcavn.jpg
 
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  • #2
kent davidge said:
I found this answer for an question of the Halliday's book but the units m².rad/s in the answer don't make sense with voltage. (sorry my poor english)
And I cannt understand why they haven't expressed the current as a function of time.

2ufcavn.jpg
You have missed the T (tesla) in the permeability of free space.
 
  • #3
Vagn said:
You have missed the T (tesla) in the permeability of free space.
Okay, I notice that. Can you explain me why the current was not expressed as a function of time? I learned from the Faraday's formula that the flux's variation is basically a derivative which involves the time.
 
Last edited:
  • #4
Because what they wrote is the amplitude of the emf.
The amplitude is not time dependent. The formula includes the amplitude of the current, io.
 
Last edited:

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