{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

3 generator a device that uses mechanical energy to

Info icon This preview shows pages 14–19. Sign up to view the full content.

View Full Document Right Arrow Icon
3) Generator: a device that uses mechanical energy to create electrical energy.
Image of page 14

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

View Full Document Right Arrow Icon
Batteries Internal resistance, r, will effectively lower the emf of the battery and, thus, must be taken into account. For now we will assume that all batteries are ideal unless specifically told otherwise. If you do encounter internal resistance know that: Δ V ba = V b – V a Δ V ba = – Ir For this circuit: = IR + Ir
Image of page 15
Circuits A typical circuit problem is to solve for the power/voltage/current at a specific point (like at a resistor). This simplest circuit to calculate the current for is the following: Using Ohm’s Law we find that: I = /R Technically, this is the only circuit you can use Ohm’s Law to solve for the current through the resistor.
Image of page 16

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

View Full Document Right Arrow Icon
Circuits Let’s say we have a circuit with two resistors in series. When these two resistors are hooked up to the battery, a current is then established. In this circuit, the amount of current moving through R 1 equals the amount of current moving through R 2 (and the same as the battery as well). I bat = I R1 = I R2 = I
Image of page 17
Circuits The potential difference across either resistor will sum to be the potential difference across the battery. In general, for series resistors: Δ V bat = Δ V 1 + Δ V 2 Equivalent resistance will be:
Image of page 18

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

View Full Document Right Arrow Icon
For Next Time (FNT) Keep reading Chapter 27 Keep working on the homework for Chapter 26
Image of page 19
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    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.

    Student Picture

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

  • Left Quote Icon

    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.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    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.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern