Force on a Current-Carrying Conductor in a Magnetic Field

State Fleming's left-hand rule.

Why does a current-carrying conductor kept in a magnetic field experience force? On what factors do the direction of this force depend? Name and state the rule used for determination of the direction of this force. 

On which factors do the force by a current-carrying conductor placed in a uniform magnetic field depend? 

If the current in a wire is flowing in the vertically downward direction and a magnetic field is applied from West to East, what is the direction of force on the wire?

Describe the activity that shows that a current-carrying conductor experiences a force perpendicular to its length and the external magnetic field. How does Fleming’s left-hand rule help us to find the direction of the force acting on the current-carrying conductor?

What does the direction of thumb indicate in the right-hand thumb rule? In what way this rule is different from Fleming’s left-hand rule?

An electron enters a magnetic field at right angles to it as shown in figure. The direction of the force acting on the electron will be:

A current-carrying straight conductor is placed in the East-West direction. What will be the direction of the force experienced by this conductor due to earth’s magnetic field? How will this force get affected on:
(a) reversing the direction of flow of current?
(b) doubling the magnitude of current?

A constant current flows through a horizontal wire in the plane of the paper from East to West as shown in the figure. The direction of magnetic field will be north to south at a point :

With the help of formula mention the factors upon which force experienced by a current carrying conductor placed in a magnetic field depends.