Question

An electron and an alpha particle enters in the uniform magnetic field antiparallel to it. the magnetic field force on the both particle will be?

Answer 1

Answer:

f=qvBsinA , so for A= 180° f = 0 so force on both particle will be zero

Answer 2

The magnetic field force on the both particle will be 0.

Explanation:

The magnetic force acting on the charged particle is given by :

$F=qvB\sin\theta$

q is charged particle

v is the speed of charged particle

$\theta$ is the angle between velocity and magnetic field

An electron and an alpha particle enters in the uniform magnetic field anti parallel to it, then the angle between electron and magnetic field is 0 degrees and the angle between electron and magnetic field is 180 degrees.

Magnetic field for electron is :

$\sin(0)=0\\\\\sin180=0$

So, the magnetic field force on the both particle will be 0.

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