Question

A capacitor with no dielectric is connected to a battery at t = 0. Consider a point A in the connecting wires and a point B between the plates.
(a) There is no current through A.
(b) There is no current through B.
(c) There is a current through A as long as the charging is not complete.
(d) There is a current through B as long as the charging is not complete.

Answer 1

There is no current flow through B and there is a current flow through A as long as the charging is not complete.

Explanation:

• When the capacitor is connected to the battery, the current flows through the wire until the charging time of the capacitor.
• After capacitor is fully charged, the potential difference across the capacitor is equal to the terminal potential of the battery.
• So, the current stops flowing and does not pass through the point between the plates of the capacitor because there is no passage medium for the flow of charge.