*99%*:**Investigating and improving introductory physics students’ understanding of electric field and the superposition principle: The case of a continuous charge distribution***68%*:**Phenomenographic analysis and comparison of students’ conceptual understanding of electric and magnetic fields and the principle of superposition***62%*:**The Electric Field - Concepts and Principles (Calculus-based)***62%*:**The Electric Field - Concepts and Principles (Algebra-based)***59%*:**Investigating and improving introductory physics students' understanding of electric flux***50%*:**Students' understanding of superposition of electric fields***50%*:**Improving Student Understanding of Vector Fields in Junior-Level E&M***50%*:**Helping students apply superposition principle in problems involving spherical, cylindrical, and planar charge distributions***49%*:**The effect of similar surface features on students’ understanding of the interaction of charges with electric and magnetic fields***47%*:**Contrasting students’ understanding of electric field and electric force***46%*:**Electric Potential - Concepts and Principles (Calculus-based)***46%*:**Electric Potential - Concepts and Principles (Algebra-based)***46%*:**The Electric Force - Concepts and Principles (Calculus-based)***46%*:**The Electric Force - Concepts and Principles (Algebra-based)***45%*:**Electric Field Concept: Effect of the Context and the Type of Questions***45%*:**Student Understanding of Superposition: Vectors and Wave Functions***45%*:**Students’ understanding of the concept of the electric field through conversions of multiple representations***44%*:**Superposition of electric fields and causality: From research to teaching***44%*:**Electric Multipole Field Model**