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Consider the situation of the pervious p...

Consider the situation of the pervious problem. (a) Calculate the force needed to keep the sliding wire moving with a constant velocity v. (b) If the force needed just after `t = 0` is `F_0`, find the time at which the force needed will be `F_0 /2`

Text Solution

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The correct Answer is:
(a) `(B^(2)l^(2)v)/(2 r(l+vt))" " (b) l//v`
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