Electric Charge...

A point charge +q is placed at the mid point of a cube of side L. The electric flux emerging from the cube is

A particle of mass m and charge q is released from rest in a uniform electric field E. The kinetic energy attained by the particle after moving a distance x is

A long, hollow conducting cylinder is kept co-axially inside another long, hollow conducting cylinder of a larger radius. Both the cylinders are initially electrically neutral.
Which of the following statements is correct based on the above-mentioned condition?

Consider a neutral conducting sphere. A positive point charge is placed outside the sphere. Then the net charge on the sphere is -