Draw the field lines for a bar magnet,a current-carrying finite solenoid,and an electric dipole.
(N/A) The figure shows the field lines for:
$(a)$ $A$ bar magnet,where magnetic field lines emerge from the North pole and enter the South pole externally,forming continuous closed loops.
$(b)$ $A$ current-carrying finite solenoid,which behaves like a bar magnet with magnetic field lines forming closed loops passing through the interior and exterior of the solenoid.
$(c)$ An electric dipole,where electric field lines originate from the positive charge and terminate at the negative charge,representing the direction of the electric field at any point.
$(a)$ $A$ bar magnet,where magnetic field lines emerge from the North pole and enter the South pole externally,forming continuous closed loops.
$(b)$ $A$ current-carrying finite solenoid,which behaves like a bar magnet with magnetic field lines forming closed loops passing through the interior and exterior of the solenoid.
$(c)$ An electric dipole,where electric field lines originate from the positive charge and terminate at the negative charge,representing the direction of the electric field at any point.
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