Question

An electron is moving north in a region where the magnetic field is south. The magnetic force exerted on the electron is:​

Answer 1

Answer:

It is fairly easy to guess the answer if you look at the Lorentz force

F=q(E⃗ +v⃗ ×B⃗ )F=q(E→+v→×B→)

Where q is the charge of the electron, v⃗ v→ is the velocity of the electron, E⃗ E→ is the electric field and B⃗ B→ is the magnetic field. In this case, the magnetic field is antiparallel to the velocity of the electron, so the second term will not contribute to the Lorentz Force. So the contribution to the Lorentz will come from the first term. If the electric field is zero then the Lorentz force is zero. But, if the electric field is not zero then the direction of the Lorentz force will be same as that of the electric field (the present case).

Remember the magnetic force can’ t accelerate the electron but can change the direction of the electron. As the direction of the magnetic field is antiparallel to the motion of the electron, the electron will continue to travel with constant velocity without altering its path.

Answer 2

Answer:

South-East direction.

Explanation:

An electron is moving north in a region where the magnetic field is south. The magnetic force exerted on the electron is South-East direction.

Electron is moving upward towards north and the current (I)of that field will be moving towards downwards that is south direction ,so due to  electron and current the flow of  the magnetic field(B) will be towards the east direction and the other magnetic field will be towards south direction,re and resultant magnetic force or field will be acting in between the south and east direction that is towards the south-east direction.

Flemings right hand rule:

Fleming’s Right Hand Rule states that if we arrange our thumb, forefinger and middle finger of the right-hand perpendicular to each other, then the thumb points towards the direction of the magnetic force, the forefinger points towards the direction of the magnetic field and the middle finger points towards the direction of the current.

       

The project code is #SPJ2