A bird dismounts on a stretched telegraph wire. The additional tension produced in the wire is :-

Z e r o

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G r e a t e r t h a n t h e w e i g h t o f t h e b i r d

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L e s s t h a n t h e w e i g h t o f t h e b i r d

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E q u a l t o t h e w e i g h t o f t h e b i r d

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Solution

The correct option is B $G r e a t e r t h a n t h e w e i g h t o f t h e b i r d$
Let the angle between position of the new wire and old wire be $θ$
Equating vertical forces
$m g = 2 T s i n θ$
$T = \frac{m g}{2 s i n θ}$
Therefore T is greater than mg

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