Question

example 1. A current carrying conductor enters a
betic field at right angles to it as shown in figure.
at will be the direction of force acting on the
magnetic fie
conductor?
Magnetic
field
Electron​

Answer 1

• The direction of force acting on the electron is into the page. 
• The direction of force is perpendicular to the direction of the magnetic field and the current as given by Fleming's left hand rule. 

State of Fleming's left hand rule.

Stretch out the forefinger, middle finger and the thumb of the left hand perpendicular to each other.

If the forefinger gives the direction of the magnetic field, the middle finger points to the direction of current of current then the thumb will give the direction of the force experienced by the current carrying conductor.