Question

draw the pattern of magnetic field lines around a current carrying straight conductor. How does the strength of the magnetic field produced : 1-with the distance from the conducconductor.2-with an increasing current in a conductor

Answer 1

It is the diagram for the sum

1.With an increasing distance from the conductor magnetic field decreases.(magnetic field is indirectly proportional to radius)

2.With an increasing current magnetic field increases.(magnetic field is directly proportional to current)

Answer 2

The pattern of magnetic field lines around a current-carrying straight conductor are concentric circles with their centers on the wire.

• The radius of the concentric field lines increases as we move farther away from the conductor. So we can conclude that, when the distance from the conductor is increased, the strength of the magnetic field decreases as the strength of the field is inversely proportional to the distance from the conductor wire.
• When the current is increased in the current-carrying wire the magnetic field lines come closer to the wire and the radius decreases. By this observation, we can conclude that the strength of the magnetic field increase with the increase in the current in the conductor as the field strength is directly proportional to the current.

∴ The field strength increases with an increase in distance from wire (1).

  The field strength decreases with an increase in the current (2).