1. Unit 5: Day 9 – Energy Stored in a Magnetic Field of an Inductor Power delivered by an inductor Work done to increase the current in an inductor The energy stored in an Inductor Comparison to the Energy stored in a Capacitor Energy stored in a Solenoid

2. Power Delivered by an Inductor When an inductor carries a current, an EMF is induced, equal to: (from Faraday’s Law) The power delivered by the inductor is: The work done to increase the current in the inductor from zero to the value I is: This is equivalent to the change in the energy stored in the inductor

3. Energy Stored in the Magnetic Field of an Inductor (Solenoid) IN an inductor of inductance L, carrying a current I, which is charging at a rate of dI/dt, is: The Energy stored in a Capacitor is:

4. Energy Stored in the Magnetic Field of an Inductor (Solenoid) If the Energy stored in the inductor is: The energy stored in a Solenoid is: and the energy density of an N-turn solenoid is: