Attract or Repel?
Electricity and Magnetism
Level
1
There are four plates: \( A, \) \( B\) and \( D \) are charged plastic plates and \(C \) is an electrically neutral copper plate. The electrostatic forces between some pairs of the plates are as follows: \[ \begin{align} A \rightarrow & \leftarrow B \\ C \rightarrow & \leftarrow A \\ \leftarrow D \quad & \quad A \rightarrow \end{align}\] For the pair \( B \) and \(D,\) do the plates repel or attract each other?
by
Krishna Singh