Ampere's circuital law states that line integral of magnetic field around any closed loop is equal to μ times the electric current flowing through the cross-section area enclosed by that loop.
Mathematically,
[tex]∮B.dl=μI[/tex]
Let the current flowing in the solenoid having number of turns per unit length n be I.
Magnitude of magnetic field inside the solenoid is B while at outside is zero.
The second and fourth term are zero because angle between magnetic field and the length loop is 90°
The third term is also zero as the value of magnetic field outside the solenoid is zero.Total current flowing through the loop.
Answers & Comments
[tex]\large\bold\orange{\underline{Answer :-}}[/tex]
Ampere's circuital law states that line integral of magnetic field around any closed loop is equal to μ times the electric current flowing through the cross-section area enclosed by that loop.
Mathematically,
[tex]∮B.dl=μI[/tex]
Let the current flowing in the solenoid having number of turns per unit length n be I.