Q. 15. State the rule to determine the direction of a
(ii) force experienced by a current-carrying straight conductor placed in a magnetic field which is perpendicular to it,
To find the force experienced by a current-carrying straight conductor placed in a magnetic field which is perpendicular to it, we use Fleming's, Left-Hand Rule.
it states that if the first three fingers of the left hand are held mutually at right angles to each other and if the index finger indicates the direction of original field, and if the middle finger indicates the direction of current flowing through the conductor, then the thumb indicates the direction of force exerted on the conductor.