A middle-A tuning fork vibrates with a frequency f of 440 hertz (cycles per second). You strike a middle-A tuning fork with a fo
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The current in a wire is defined as the amount of charge that passes a given point of the wire in a given time:
where Q is the charge and
is the time interval.
Since one electron has a charge of
, the total charge of 
electrons is
And since the time interval is
, the current in the wire is
where Q is the charge and
Since one electron has a charge of
And since the time interval is