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The Open Circle


The Open Circle program, for use in kindergarten through fifth grade, is designed to equip teachers with effective practices for creating a cooperative classroom community and establishing positive relationships and effective approaches to problem solving within the classroom. Open Circle is an inclusive, contemplative, and compassionate community, committed to working together to rebuild humanity for a more loving world. Target Circle is a loyalty program where you can earn 1% in Target Circle earnings rewards every time you make an eligible purchase with non-RedCard payment, which can be used at Target, in-store or online. Start studying Open or closed circle - MATH. Learn vocabulary, terms, and more with flashcards, games, and other study tools.

Definition of open-circuit voltage. The box is any two-terminal device, such as a battery or solar cell. The two terminals are not connected to anything (an 'open circuit'), so no current can flow into or out of either terminal. The voltage voc between the terminals is the open-circuit voltage of the device.
Black curve: The highest possible open-circuit voltage of a solar cell in the Shockley-Queisser model under unconcentrated sunlight, as a function of the semiconductor bandgap. The red dotted line shows that this voltage is always smaller than the bandgap voltage.

Open-circuit voltage (abbreviated as OCV or VOC ) is the difference of electrical potential between two terminals of a device when disconnected from any circuit.[1] There is no external load connected. No external electric current flows between the terminals. Alternatively, the open-circuit voltage may be thought of as the voltage that must be applied to a solar cell or a battery to stop the current. It is sometimes given the symbol Voc. In network analysis this voltage is also known as the Thévenin voltage.

The open-circuit voltages of batteries and solar cells are often quoted under particular conditions (state-of-charge, illumination, temperature, etc.).

The potential difference mentioned for batteries and cells is usually the open-circuit voltage. The open-circuit voltage is also known as the electromotive force (emf), which is the maximum potential difference when there is no current and the circuit is not closed.

The opposite of an open circuit is a 'short circuit'.

To calculate the open-circuit voltage, one can use a method similar to that below.


Consider the circuit:

If we want to find the open-circuit voltage across 5Ω resistor. First disconnect it from the circuit:

Find the equivalent resistance in loop 1 and hence find the current in the loop. Use Ohm’s Law to find the potential drop across the resistance C. The resistor B does not affect the open-circuit voltage. Since no current is flowing through it, there is no potential drop across it. So we can easily ignore it.

Therefore, the potential drop across the resistance C is VL.

What Does The Open Circle Mean In Math

This is just an example. Many other ways can be used.[2]

See also[edit]


  1. ^
  2. ^Thevenin's Theorem-One Independent Source, retrieved 2018-06-03

The Open Circle Norwich Ct

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Dear Open Circle educators,


We are reaching out to say that we support you and we are here for you. We are in the midst of a whirlwind of change and uncertainty, requiring each of us to reach deep into our emotional, social and mental reserves to make in-the-moment adjustments, creatively problem-solve, and wholeheartedly embrace that the only constant is change. We all have had to manage our own emotions in order to provide calm guidance and support in our personal and professional roles.

At this point our entire staff is working from home. Like you, we are using Google Hangouts, Zoom, and other platforms to communicate. In addition, many of us with school-aged children have shifted into homeschooling mode and have certainly deepened our appreciation for all that you do as classroom teachers and school administrators!

One of the hallmarks of the Open Circle approach is the focus on the power of relationships as a lever for effective SEL. Although we have to maintain physical distance to ensure safety and health, we can still be social beings and reach out in virtual ways to maintain those social bonds. We know that each of you is leaning on the foundation of relationships you’ve created to provide the remote educational support that students and families need. We are working diligently to adapt and create resources to support your continued work with students. You’ll be hearing more from us in the coming days and weeks as we prepare these resources for you.

We also want you to know that the Open Circle team is carefully examining our professional development approach for the upcoming training cycle and we will get back to you with up-to-date information when we have more to share.

Please feel free to reach out to us at [email protected] with any questions, or specific suggestions and we’ll do everything we can to address them. Stay well.

In solidarity,

The Open Circle Team

Please visit this page again, as this page will be updated with the latest resources to assist educators during the COVID-19 crisis.