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5/30 MCQs for:
Electric fields
Electric field lines near positive point charges:
Three identical charges of 3.0 µC are placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any one of the charges?
Two 0.20-g metal spheres are hung from a common point by non-conducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle between the threads is 200. How much charge was placed on each sphere?
Is it possible to have a zero electric field value between a negative and positive charge along the line joining the two charges?

Sphere A carries a net charge and sphere B is neutral. They are placed near each other on an insulated table. Which statement best describes the electrostatic force between them?