# ch24_p13 - 13 First we observe that V(x cannot be equal to...

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13. First, we observe that V ( x ) cannot be equal to zero for x > d . In fact V ( x ) is always negative for x > d . Now we consider the two remaining regions on the x axis: x < 0 and 0 < x < d . (a) For 0 < x < d we have d 1 = x and d 2 = d – x . Let V x k q d q d q x d x ( ) = + F H G I K J = + F H G I K J = 1 1 2 2 0 4 1 3 0 π ε and solve: x = d /4. With d = 24.0 cm, we have x = 6.00 cm. (b) Similarly, for x < 0 the separation between
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