At the centre of a long solenoid carrying a current of 2.0 A , the magnetic intensity H is measured to be 1500 A m ⁻¹ . When a rod is inserted as the core in the solenoid, determine the magnetic intensity H at the centre.

Step-by-step solution

The magnetic intensity H inside a long solenoid is given by the formula H = nI , where n is the number of turns per unit length and I is the current flowing through the solenoid. The value of magnetic intensity H depends only on the free current I and the geometry of the solenoid ( n ). It is completely independent of the medium or the material of the core inserted inside the solenoid. Since the current and the number of turns per unit length remain unchanged, the magnetic intensity H will remain the same after the