Ans: One of the most common questions in all the Board examinations from the chapter on Electricity is the circuits’ mathematical problem. To answer any of these mathematical questions, you need to understand the concepts of resistance and resistors. You will also need an idea about current and potential differences. Another important concept that you need to get cleared is how the resistors are connected- in series or parallel. NCERT Solutions are designed to clear these concepts and provide different types of problems associated with the concepts. It also provides a list of solved examples to help students learn about the different kinds of problems that come in the board examinations.