Question

Which of the following quantities change when an electron passes through a magnetic field: Speed of electron or direction of electron?
Given reason for your answer.

Need a good explanation part.
| CBSE | Class X

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Answer 1

Answer:

The direction of the electron changes when an electron is placed in a magnetic field.

Explanation:

This is due to the force that the electron experiences due to the current generated by it and the magnetic field experienced.

The force changes the direction of Electron and displaces it. Thus,

Direction and Velocity changes (Vector quantity)

and not the speed (being a scalar quantity) which doesn't involve direction.

I hope it helps. once again xd

Answer 2

$\large{\underline{\sf Answer :-}}$

When an electron passes through a magnetic field, there will be change in the direction of electron.

If under a conducting wire, a magnetic needle is placed parallel to it and the electric is sent through the wire, then the magnetic needle will undergo a deflection.

Now if the direction of current be reversed, then the deflection of needle will also take place in reverse direction. If the conducting wire is placed below the magnetic needle then the direction of deflection will change. Here, the magnitude of deflection will increase with the increase of current strength and vice versa. If the current carrying conducting wire is kept perpendicular to the magnetic needle, then there will not be any deflection in the needle.

It's observed that the speed of the electron remains the same but the direction of deflection changes.