Calculating the Average Current of a Rotating Charge q | Insulating String

[eagleswings]

[SOLVED] really weird one

Homework Statement

A small sphere that carries a charge q is whirled in a circle at the end of an insulating string. the angular frequencyy of rotation is omega [w]. What average current does this rotating charge represent?

Homework Equations

I = dQ/dt; w = 2(pi)/T; x[t] = Acos[wt +C];

The Attempt at a Solution

; this question doesn't make sense to me. q never changes - it just travels in a circle - so dq/dt =0;there is one charge going in a circle, but not axially which would represent charge in a conduit. is this a picture of alternating current? [we haven't gotten to that yet].

 

[Shooting Star]

Current is the net charge per unit time passing a given point. On any point on the circumference, what is that value?

 

[eagleswings]

That would be qw = charge per second. surely not that simple. thanks

 

[Shooting Star]

Should be q/T = qw/2pi.

 

[eagleswings]

thanks shooting star!