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Physics Classroom is making strides to make our site accessible to everyone. Our site contains 6 navigation areas. The Primary, Secondary, and Page Level navigations have a screen reader version of their nav structure that allows using the left and right keys to navigate sibling navigation items, and up or down keys to navigate parent or child navigation items. The others can be navigated using tabs. The Primary Navigation handles the first 2 levels of site pages. The Secondary (which is not always available) handles the 3rd and 4th level of structure. The Page level navigation allows you to navigate the current page's headings quickly. The Header Navigation contains the Light/Dark Mode toggle, Search, Notifications and account login. The Breadcrumb Navigation contains the breadcrumb of the current page. If the current page has a breadcrumb, you can get to it by skipping to the content and tabbing in reverse (shift plus tab). The Footer Navigation contains links such as Privacy, Contact, about and terms. Some resources contain an Audio Player that can be activated by holding down the T key for 3 seconds, and then using K to pause and resume. While not every area of Physics Classroom is usable purely from keyboard and screen reader, we are committed to continue work on making this possible. If you have questions or need additional help, please use this link to contact us.

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Polarization - Directions

Using the Polarization Concept Builder is quite simple. There are three different activities, each with a different emphasis. In each activity you will be presented with a question that you will have to answer.

In the first activity - Separation of Charge - you will be asked to determine how charge polarizes itself on a neutral conducting object when a charged object is brought near it. You will tap on the neutral object to toggle through the options for how charge becomes polarized. You must also identify the object as being "positively-charged", "negatively-charged", "electrically neutral", or "polarized"; you can choose more than one answer. Once you have completed these two tasks, a Check Answer button appears. Once you are satisfied with your answers, tap on the Check Answer button. Your answer will be evaluated and your Progress Report will be updated.

In the second activity - Particle Flow - you must show how charge polarizes itself on a collection of three conducting and insulating blocks. You so do by tapping on the Charge Distribution button in order to toggle through the six options. You must also identify the manner in which charge flows in order to cause such a separation of charge. This is done by tapping on the Particle Movement button. Once you have done both of these tasks, a Check Answer button appears. Once you are satisfied with your answers, tap on the Check Answer button. Your answer will be evaluated and your Progress Report will be updated.

In the third activity - Induction - an induction charging process is described and animated. You can tap the Replay button to view the animation as many times as needed. You will have to identify the resulting charge of the object. You also have to explain how the object becomes charged in terms of particle movement. You can tap on the diagram at the bottom right in order to toggle through the eight options. Once you have done both of these tasks, a Check Answer button appears. Once you are satisfied with your answers, tap on the Check Answer button. Your answer will be evaluated and your Progress Report will be updated.

Your goal is to earn "Stars" and to complete one or more activities. Stars are earned when you show success on a particular question. Once you show success on all the questions for a particular activity, you will earn the Trophy for that activity.

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