In the (i) absence of electric field, and in the (ii) presence of electric field, the paths of electrons between successive collisions with the positive ions of the metal, are

(i) Straight line, (ii) Curved in general

The correct answer is Option (4) → (i) Straight line, (ii) Curved in general

Analysis: In the absence of an electric field, electrons move freely between collisions — their paths are straight lines. When an electric field is applied, electrons experience a force and are accelerated, so their paths become curved in general.