Question

Circuit.
24. A solenoid of inductance 8.0mH carries a current of 2.0A. How much energy is stored in the
magnetic field inside the solenoid?
25. What are meant by the magnetic currentibdilati.​

Answer 1

24. Ans =1 J

25. Ans = Magnetic current is, nominally, a current composed of fictitious moving magnetic monopoles. It has the dimensions of volts. The usual symbol for magnetic current is {\displaystyle k}k which is analogous to {\displaystyle i}i for electric current. Magnetic currents produce an electric field analogously to the production of a magnetic field by electric currents. Magnetic current density, which has the units of V/m² (volts per square meter), is usually represented by the symbols {\displaystyle {\mathfrak {M}}^{t}}{\displaystyle {\mathfrak {M}}^{t}} and {\displaystyle {\mathfrak {M}}^{i}}{\displaystyle {\mathfrak {M}}^{i}}. The superscripts indicate total and impressed magnetic current density.[1] The impressed currents are the energy sources. In many useful cases, a distribution of electric charge can be mathematically replaced by an equivalent distribution of magnetic current. This artifice can be used to simplify some electromagnetic field problems