Science
Name and state the rule to determine the direction of a :
(a) magnetic field produced around a current carrying straight conductor.
(b) force experienced by a current carrying straight conductor placed in a magnetic field which is perpendicular to it.
Electro-Magnetism
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Answer
(a) The rule used to determine the direction of the magnetic field around a current-carrying straight conductor is the Right-Hand Thumb Rule.
Right-Hand Thumb Rule : If you hold the current-carrying conductor in your right hand such that your thumb points in the direction of the current, then the curl of your fingers around the conductor gives the direction of the magnetic field lines.
(b) The rule used to determine the direction of the force experienced by a current-carrying conductor placed in a perpendicular magnetic field is Fleming’s Left-Hand Rule.
Fleming’s Left-Hand Rule : If you stretch the thumb, forefinger, and middle finger of your left hand mutually perpendicular to each other such that the forefinger points in the direction of the magnetic field and the middle finger points in the direction of current, then the thumb will point in the direction of the force (motion) of the conductor.
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