Question 1: A polythene rod is rubbed with a cloth. The rod becomes negatively charged. Which diagram shows how it becomes negatively charged? A. Diagram A B. Diagram B C. Diagram C D. Diagram D Question 2: Which pair of changes must cause the resistance of the wire to increase? A. Decrease diameter | Decrease length B. Decrease diameter | Increase length C. Increase diameter | Decrease length D. Increase diameter | Increase length Submit & Show Correct Answers