Question

If suddenly the gravitational force of attraction between earth and a satellite revolving around it
becomes zero, then the satellite will
(1) continue to move in its orbit with same velocity
(2) move tangentially to the original orbit with the same velocity
(3) become stationary in its orbit
(4) move towards the earth

Answer 1

option 2 is correct...................

Answer 2

If suddenly the gravitational force of attraction between earth and a satellite revolving around it  becomes zero, then the satellite will (2) move tangentially to the original orbit with the same velocity

In a circular motion there are two forces acting on a body:

1) centripetal force towards center due to gravity

2) tangential force along the tangent of the circular orbit

When the gravitational force becomes zero that means the centripetal force required cannot be provided therefore the satellite will tend to move tangential to the original orbit  with the same velocity.