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Two small balls having equal positive ch...

Two small balls having equal positive charge Q (clulomb) on each are suspended by two insulating stirngs of equal length L (meter) from a hook fixed to a stand. The whole set-up is taken in a satellite into space where there is no gravity (state of weightlessness). ltbRgt (i) what is the angle between the two strings.
(ii) What is the tension in each string?

Text Solution

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Where there is no gravitational force, then in this case only electrostatic force of repulsion is acting which will take the two balls as far as possible. The angle between the two strings will be `180^(@)`. The tension in the string will be equal to the electrostatic force of repulsion, i.e.,
`T=(1)/(4piepsilon_(0))xx(QxxQ)/((2L)^(2))=(1)/(4piepsilon_(0))xx(Q)/(4L^(2))`
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