Question

In the figure given below, direction of force acting on electron will be towards (Assume uniform magnetic field in
vertically downward direction]

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Answer 1

East

this is because of Fleming left hand rule

according to this rule in this condition the electrons move towards north the the current flows toward south

and

the magnetic field is towards downward direction

then

our index fingure point towards downward

our middle points south and thumb points towards east

Answer 2

In the figure given below, the direction of force acting on the electron will be towards the East.

• The given question can be solved by applying Fleming's Left Hand Rule.
• According to this rule, if the fingers of our left hand are stretched mutually perpendicular to each other such that the index finger points towards the direction of the magnetic field and the middle finger points towards the direction of the current, then the thumb represents the direction of the force.
• In the given situation, the magnetic field is in -z-direction and the direction of current is -y. (The direction of current is opposite to the direction of the electron.)
• The force is thus acting in +x-direction. This represents the East.