Two small balls having equal positive charges $Q$ on each are suspended by two insulating strings of equal length $L$ , from a hook fixed to a stand. The whole setup is taken in a satellite into space where there is no gravity (state of weightlessness), then the angle between the two strings in equilibrium is -

0^{\circ}

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90^{\circ}

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180^{\circ}

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60^{\circ}

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Solution

The correct option is C $180^{\circ}$
When the whole setup is taken in a satellite where there is no gravity- means state of weightlessness, there will be only tension and electrostatic force on the charges. The tension will balance the electrostatic repulsion in equilibrium.

Therefore, the angle between the two strings in equilibrium is $180^{\circ}$ .

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