Question

a positive charge is moving upwards in a magnetic field directed towards north . the particle will be deflected towards.
a. west
b. north
c.south
d.east​

Answer 1

Answer:

a positive charge is moving upwards in a magnetic field directed towards north . the particle will be deflected towards south.

Answer 2

Answer:

The particle will be deflected towards the west i.e.option(a).

Explanation:

The  force in a magnetic field is given as,

$F=q(v\times B)$     (1)

Where,

F=force acting on the charged particle

q=charge on the particle

v=velocity with which the particle is moving

B=magnetic field region in which the particle is present

From the question we have,

• As the charge is moving upwards that means it is coming out i.e. it is moving along the positive z axis i.e.$\hat{k}$

• And the magnetic field is directed towards the north i.e.moving towards the positive y-axis i.e.$\hat{j}$

By using the above two points in equation (1) we get;

$F=q(\hat{k}\times \hat{j})=q(\hat{-i})$               (2)

From equation (2) we can see that the force is acting in the negative x-axis direction. so, the particle is moving west.

Hence, a positive charge is moving upwards in a magnetic field directed towards the north the particle will be deflected towards the west i.e.option(a).