Case Studies: Electric Power - Directions

Using the Case Studies: Electric Power Concept Builder is quite simple. There are three different difficulty levels, with each level adding a different degree of complexity.. Each question in iall levels presents two ciircuits - Circuit A and Circuit B - in teh form of a description and a diagram. You must decide which circuit has the greatest electric power (i.e., brightest bulb); and in the wizard difficulty level, you must also determine the factor by which it is greatest.

In the Apprentice and Master Difficulty Level, you are presented with two diagrams of a simple circuit consisting of a battery, an ammeter (labeled A and positioned inside a circle; measures current), and a light bulb. You are provided information about two of three variables. The variables are the battery voltage (symbol is ∆V), the current (symbol is I), and the resistance (symbol is R). You must decide which circuit has the brightest bulb (i.e., the greatest power). You tap on the buttons below the diagram to indicate your answer. As long as you have selected an answer, the Check Answer button will appear. 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.

The Wizard Difficulty Level operates in the same manner; but you also have to indicate by what factor the power is greatest. You indicate your answers by tapping on the button that by default reads Tap Me!. Tapping will toggle throug the answer choices. As long as you have a chosent answer for each question, the Check Answer button will appear. 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 difficulty levels. Stars are earned when you show success on a particular question. Once you show success on all the questions for a particular level, you will earn the Trophy for that level.