For the current-carrying solenoid shown, sketch the magnetic field lines and explain, with reason, at which of the points A, B, and C the magnetic field is strongest and at which it is weakest.
Point A is present inside the solenoid in the where the density of magnetic lines is . So, the magnetic field at point A is .
Point C also lies on the but at the left end. So, the magnetic field at point C is that at point A.
Point B lies where the density of magnetic lines is as they are sparse. So, the magnetic strength at point B is .
Hence, the order of magnetic field strength from highest to lowest is .
Point C also lies on the but at the left end. So, the magnetic field at point C is that at point A.
Point B lies where the density of magnetic lines is as they are sparse. So, the magnetic strength at point B is .
Hence, the order of magnetic field strength from highest to lowest is .