Question

A positive charge enters in a magnetic field and travels parallel to but opposite the field. If experiences
(a) an upward force.
(b) a downward force.
(c) an accelerated force.
(d) no force.

Answer 1

Answer:

option c

Explanation:

because if the charge is moving in opposite direction of magnetic field then definetily it will require an accelerated force to move opposite ....

Answer 2

" Option C) An accelerated force ".

Explanation:

• Normally the direction of the positive charge move on magnetic field is the direction of the magnetic force on a travelling charge is perpendicular to the plane formed by v and B and follows right hand rule-1.

• zero force when velocity is parallel to magnetic field is in the case above the magnetic force is zero because the velocity is parallel to the magnetic field lines. If the velocity and the magnetic field are parallel (or antiparallel), there is no force.

• Here, A positive charge enters in a magnetic field is perpendicular to the plane and that charges travels or moves towards the plane in parallel manner means same direction is continued.

• But in the plane the positive charge travels opposite to the field means that have some an accelerated force, because When a charged particle moves parallel to the magnetic field vector, the magnetic force acting on the particle is zero.

In experiences,

Force of repulsion by wire D and G on wire C is equal and opposite.