{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

lecture11

# lecture11 - 11 Lecture 11 11.1 Inductors A solenoid a part...

This preview shows pages 1–2. Sign up to view the full content.

11. Lecture 11 11.1 Inductors A solenoid a part of a circuit is also called an inductor. Its purpose is to store energy similarly to a capacitor. However it stores energy in a magnetic field as opposed to a capacitor which stores energy in an electric field. This makes its electrical characteristic di ff erent from the capacitor. Indeed, we know that the magnetic field produced inside the solenoid is given by B = μ 0 IN ˆ z (11.1) where N is the number of turns, is the length of the solenoid and I is the current. If the current changes, the magnetic field and therefore its flux changes (see fig65) producing a voltage between the terminals of the solenoid. Using Faraday’s law, Lenz law and looking at the figure we conclude that V a V b = ∆Φ t = NA | B | t = NAμ 0 N I t = L I t (11.2) where A is the cross section area of the solenoid. We defined the quantity L = μ 0 N 2 A (11.3) which is given in terms of the area A , the length and the number of turns. It is a property of the solenoid and is called the inductance. It is measured in Henrys (H):

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern