(a) Draw magnetic field lines produced around a current carrying straight conductor passing through a cardboard. Name, state and apply the rule to mark the direction of thers field lines. (b) How will the strength of the magnetic field change when the point where magnetic field is to be determined is moved away from the straight wire carrying constant current? Justify your answer?

(a) Draw magnetic field lines produced around a current carrying strai

1.	(a) Draw magnetic field lines produced around a current carrying straight conductor passing through a cardboard. Name, state and apply the rule to mark the direction of thers field lines. (b) How will the strength of the magnetic field change when the point where magnetic field is to be determined is moved away from the straight wire carrying constant current? Justify your answer?
Answer» Solution :To MARK the direction of magnetic field lines, we will use the Right hand thumb rule. If the CURRENT carrying straight conductor is held in the right hand in such a way that the thumb POINTS towards the direction of current, then your fingers will wrap around the conductor in the direction of the field lines. (B) `` The strength of the magnetic field decreases when the point where magnetic field is to be DETERMINED in moved away from a straight wire carrying constant current. `` The strength of the magnetic field is inversely proportional to the distance from the origin. As the distance increases the strength decreases.