*83%*:**Students' understanding of voltage in simple series electric circuits***58%*:**Potential difference and current in simple electric circuits: A study of student’s concepts***54%*:**A Study of Children's Understanding of Electricity in Simple DC Circuits***54%*:**Conceptual Understanding of Resistive Electric Circuits Among First-year Engineering Students***53%*:**Voltage is the Most Difficult Subject for Students in Physics by Inquiry's Electric Circuits Module***52%*:**A study on the impact of real, virtual and comprehensive experimenting on students’ conceptual understanding of DC electric circuits and their skills in undergraduate electricity laboratory***51%*:**Macroscopic phenomena and microscopic processes: Student understanding of transients in direct current electric circuits***45%*:**Relationship between students' conceptual knowledge and study strategies-part I: student learning in physics***45%*:**Difficulties Understanding the Explicative Model of Simple DC Circuits in Introductory Physics Courses***44%*:**Exploring Students' Conceptions of Density: Assessing Nonmajors' Understanding of Physics***43%*:**Student misconceptions of an electric circuit: What do they mean?***42%*:**Students' understanding of direct current resistive electrical circuits***42%*:**Identifying Stumbling Blocks in the Development of Student Understanding of Moments of Forces***42%*:**The Understanding of the Properties of Light by Students in India***42%*:**Physics Students' Understanding of Relative Speed: A Phenomenographic Study***41%*:**Understanding Students' Poor Performance on Mathematical Problem Solving in Physics***41%*:**Contrasts in Student Understanding of Simple E&M Questions in Two Countries***41%*:**Students’ understanding of dot product as a projection in no-context, work and electric flux problems***39%*:**Research as a Guide for Curriculum Development: An Example from Introductory Electricity. Part I: Investigation of Student Understanding**