If you put your right hand out flat, and imagine a magnetic field pointing in th

Question

If you put your right hand out flat, and imagine a magnetic field pointing in the direction of your fingers, and a current in a wire pointing at right angles to it. along the direction of your outstretched thumb, what direction will the force on the wire? Along the direction of your fingers Opposite to the direction of your fingers In the direction out of the back of your hand, downwards Opposite to the direction of your thumb In the direction out of the palm of your hand, upwards Along the direction of your thumb As magnetic field and current are at right angles, there is no force.

Explanation / Answer

Opposite to the direction of thumb

Because force is vector(cross Product) of Length vector along current with magnetic field

but the direction mentioned is basically direction of unit vector along the vector(cross product) of magnetic field with the Length vector along current . so force will be opposite to the direction of thumb

Note ; Recall right hand thumb rule for vector product

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