A2L Item 120

Goal: Problem solving with Coulomb’s law

Source: UMPERG-A2LEM4

What is the size of the electrical force on the charge q shown in the diagram?

  1. √2kqQ/(4a2)
  2. kqQ/a2
  3. √2kqQ/(2a2)
  4. kqQ/(2a2)
  5. None of the above

Commentary:

Answer

(3) It is a common mistake to forget to take the y-component of the
force.