- Jo N A On Each Other And Draw Ction They Will Move D I If A Steel Toroid 3000 With A Circular Cross Sectional Ar 1 (28.57 KiB) Viewed 29 times
jo #N a on each other and draw ction they will move. d) i) If a steel toroid (-3000), with a circular cross-sectional area of 4x10+ m², has a length of 30 cm is wrapped with a 3.5 A current carrying wire with 300 turns, what is the magnetic flux in the toroid? ii) If there is a 5 cm air gap cut into the toroid described in 3d)i) what is the new magnetic flux and what is the magnetic flux density in the air gap? 2 e) i) If a coil is made of 400 turns over a length of 20 cm and is wound around a core with relative permittivity of 3500 and a cross-sectional area of 1×10 m². What is the inductance of the coil? ii) If the coil described in 3e)i) is connected up with a resistor of 200 , a switch and a 12 V battery. How long does it take the current to reach 63% 1, when the switch is closed? 2 5