Question

Which rule is for direction of magnetic field produced around a current carring conductor?

Answer 1

i)The- direction of the magnetic field produced by a current-carrying conductor is given by Maxwell’s right hand thumb rule.It states that if you holding the current-carrying conductor in your right hand such that the thumb points in direction of the current, then the direction in which the fingers encircle, gives the direction of magnetic lines. This rule is also called Maxwell’s Corkscrew Rule. (ii)Fleming’s Left-Hand Rule:Hold the thumb and the first two fingers of your left hand mutually at right angles to each other . Then if the Forefinger points in the direction of the Field, and the second finger in the direction of the Current, the thumb will point in the direction of Motion of the conductor. (iii)The direction of a current induced in a circuit by changing magnetic flux due to a bar magnet is given by Lenz’s law.Lenz’s Law states that: ” the direction of an induced emf is such that it will always opposes the change that is causing it”. In other words, an induced current will always oppose the motion or change which started the induced current in the first place .
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