Physics
In a optical fibre cable, the signal is propagated along the

Inner Core
Surface and cladding
Both core and cladding
Cladding

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Physics
A boy is swinging a ball attached to a string in a horizontal circle. If the string snaps

None of these
It will continue to travel along a tangent to the circle at the point the ball was at the time of snapping and finally fall down
The ball will travel towards the center of the circle and fall down
It will fall down at the same place where the string breaks

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