A coil that consists of 450 windings is wound around a Bakelite ring. The mean diameter of the ring is 100 mm and the diameter of the Bakelite core is 20 mm.The current through the coil is 3A. Determine the field strength

An inductor is constructed by winding a coil of 100 turns around a magnetic core. The core is a cylinder with radius 0.5 cm and the core material has relative permeability of 1000. The coil covers a length of 10 cm. Determine the resulting inductance. Enter your answer in mH rounded to two decimal places.

1. A purely resistive circuit the current is leading by 90° with respect to voltage. 2. A purely inductive circuit the current is lag behind the voltage by 90°. 3. A purely capacitive circuit the current is lead by 90° with respect to the voltage. 4. A capacitor element stored magnetic energy. 5. An inductor element stored electrical energy. 6. Resistor elements consume power. 7. Angle between current and voltage is called power. 8. The power factor angle for a purely resistive is zero. 9. The power factor angle for a purely inductive load is -90°. 10. The power factor of a purely capacitive is leading.

For the series RL circuit shown in the figure below, answer the following questions and justify your answer.If the current is kept constant, does the coil have inductance?If the current is kept constant, does the coil affect the current value?Can the reverse emf ever be greater than the battery emf?