Question

A current-carrying straight wire is held in exactly vertical position. If the current passes through this wire in the vertically upward direction, what is the direction of magnetic field produced by it? Name the rule used to find the direction of magnetic field. 

Answer 1

It is given that the current-carrying straight wire is held in vertical position. If current passes through this wire in vertically upward direction, magnetic field produced by it will be in anticlockwise direction. Right hand thumb rule will be used to find the direction of magnetic field.