# Is this solution correct?

1. Nov 27, 2015

### kent davidge

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.

2. Nov 27, 2015

### Vagn

You have missed the T (tesla) in the permeability of free space.

3. Nov 27, 2015

### kent davidge

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 wich involves the time.

Last edited: Nov 27, 2015
4. Nov 27, 2015

### nasu

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: Nov 27, 2015