(Solved): A ferromagnetic material as shown with a square cross-sectional area of 16cm2 has a relative permea ...
A ferromagnetic material as shown with a square cross-sectional area of 16cm2 has a relative permeability of 1000. The number of turns in the coil is 1000. If the outer (maximum) circumference of the core is 60.0cm, the current required to produce a flux of mWb is Amperes.
A ferromagnetic material (Fig. A) with a square cross-sectional area of 16cm2 has a relative permeability of 1000. The number of turns in the coil is 1000. The magnetic flux established in the core (Fig. A) is mWb. The above core is cut into equal halves and the one with the coil is extended with the same material as shown in Fig. B. If the outer (maximum) circumference of the core in Fig. A is 65.5cm, the new number of turns in the coil required (Fig. B) to produce the same magnetic flux of mWlb with same current as of Fig. A is turns. Fig. A
A ferromagnetic material (Fig. C) with a square cross-sectional area of 16cm2 has a relative permeability of 1000. The number of turns in the coil is 1000. The magnetic flux established in the core (Fig. C) is mWb. The above core is cut into equal halves and the one with the coil is extended with the same material as shown in Fig. D. If the outer (maximum) circumference of the core (Fig. C) is 87.0cm, the new current in the coil required (Fig. D) to produce the same magnetic flux of mWb without changing the number of turns (the turns being same as of Fig. C, i.e., 1000) is Amperes. Fig. C Fig. D