A long solenoid is wound around a silver core ($\chi$_m = -2.6 $\times$ 10^-5)and carries a current.If the core is removed while the current is held constant,the magnetic field inside the solenoid A)remains constant. B)increases by approximately 0.003%. C)decreases by approximately 0.003%. D)increases by approximately 0.007%. E)decreases by approximately 0.006%.

Question

Quizplus · Accepted Answer

The magnetic field inside a solenoid is proportional to the magnetic permeability of the core. When the silver core is removed, the magnetic permeability of the solenoid decreases, which causes the magnetic field to decrease. The decrease in the magnetic field is approximately 0.003%.

A Long Solenoid Is Wound Around a Silver Core χ\chiχ m = -2

A Long Solenoid Is Wound Around a Silver Core $\chi$ _m = -2