17. What type of device consists of a coil with a moveable iron core.. 18. What will happen when an inductor's magnetic field collapses the voltage will? 19. What is the inductance of 5H and 100 milli H coil connected in parallel. 20. It is the magnetic field generated around a conductor when a current passes throug

If a current pass through an inductive, .magnetic energy will store in the coil True O False O

1. A magnetic circuit constructed of sheet steel has an average length of 1.5 m and cross sectional area of 0.025 m². A 50 turns coil wound on the ring has a resistance of 0.8 Q and draws 4 A from A DC supply. The relative permeability is 5000. Determine a) The flux density. b) Voltage applied. c) If the material is replaced with another material with a relative permeability of 3000 and keeping the other parameters as it is then calculate the new flux and explain what happened.

The full-scale deflecting torque of a 20 A moving-iron ammeter is 6 x 105 N-m. What is the rate of change of self-inductance with respect to the deflection of the pointer of the ammeter at full scale?