What happens when a current-carrying conductor is placed in a magnetic field?

A current-carrying conductor is held in exactly vertical direction. In order to produce a clockwise magnetic field around the conductor, the current should be passed in the conductor:

(a) from top towards bottom

(b) from left towards right

(c) from bottom towards top

(d) from right towards left

A thick wire is hanging from a wooden table. An anticlockwise magnetic field is to be produced around the wire by passing current through this wire by using a battery. Which terminal of the battery should be connected to the:

(a) top end of wire?

(b) bottom end of wire?

When is the force experienced by a current-carrying conductor placed in a magnetic field largest ?

In a statement of Fleming's left-hand rule, what do the following represent?

(a) direction of centre finger.

(b) direction of forefinger.

(c) direction of thumb.