A and B are two coils close. A has 1200 turns, and B has 1000 turns. When a current of 0.8A flows in coil A, a flux of 100 µWb links with coil A, and 75% of this flux links coil B. Determine the self-inductance of coil A and the mutual inductance.

In an interval of 0.1 second, a coil of 100 turns whose area is 35 cm2 produces a voltage of -5.6 V. Determine the change in flux density passing through the coil.

The flux through a toroidal magnetic material is 6 µWb, and the magnetic field intensity is 12 A/m. The length of the magnetic path is 0.6 m, and it's effective cross-sectional area is 1.5x 10¯4m². Determine the coil's mmf in Amp Give your answers correct to 1 decimal places. Answer:

A flux of 0.0016 Wb flows in a silicon sheet steel coil/core. The arrangement appears as shown below with the following dimensions: Ac = 0.0025 m? Core/gap area: Flux path length: le = 0.350 m lg = 0.0015 m N = 500 Air gap length: Number of turns: %3D A. What is the current, I, through the winding? B. What is the energy stored in the inductance? C. Assume that the current is given by i =9.75 sin (3147) A. What is the RMS voltage that would appear across the winding? D. Assume that the gap is removed from the arrangement with the flux path remaining at 0.350 m. For a flux of 0.0016 Wb, what is the inductance of the arrangement? E. What is the energy stored in the inductance with the gap removed?