Question

The force on a charge due to magnetic field can act

Answer 1

Answer:

qvB is the magnitude of the force.

And Direction is perpendicular to both magnetic field and Velocity.

Answer 2

Force on the positive charge is perpendicular to the direction of the velocity of the charge in motion and the direction of the induced magnetic field

To determine either the force on a moving charge given that the direction of the other two values are known, you can use the right hand thumb rule  or left hand thumb rule.

Right hand = when finding magnetic force on a conductor)

Left hand = direction of induced current)

Stretch out your middle finger, index finger and thumb.

the Thumb is the direction of the force acting on the charge, the Middle Finger is the direction of current or induced current and the Index Finger is the direction of the magnetic field.

You can similarly deduce the direction of current and the magnetic field using the right or left hand thumb rule.

You can also find the value of force on the charge by using the formula:

F = qvBsin∅

where q = charge

           b = velocity of charge

           B = value of magnetic field