PHYSICS · Multi-part · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
At a certain location in deep space, a small test charge of +2.0μC placed at rest experiences a constant 0.050N force directed due west. Assume no other forces act on the charge.
(a) Describe the direction of the electric field vector at this location and justify your answer based on the information provided.
(b) A test charge of −2.0μC is now placed at the same point. Determine both the direction and the relative magnitude of the electric force that this negative charge will experience compared with the force on the positive charge. Explain your reasoning.
(c) Discuss whether or not the magnitude of the electric field at this location depends on the magnitude of the test charge used to measure it. Provide a clear explanation that references the defining properties of electric fields.