Question

Draw the pattern of magnetic field lines of a current carrying solenoid. What does the pattern of field lines inside the solenoid indicate? Write one application of magnetic field of current carrying solenoid.

Answer 1

Magnetic field due to solenoid

$B=\mu nI;n=\frac{N}{L}=\frac{numberofturns}{length}$
The field lines inside the solenoid are in the form of parallel straight lines. Which indicates that the magnetic field is the same at all points inside the solenoid. i.e. the field is uniform inside the solenoid. The magnetic field of a current carrying solenoid is used in making electromagnets.