What must be connected between the points P and Q to establish a steady current through the incomplete circuit diagram given?

What must be connected between the points P and Q to establish a steady current through the incomplete circuit diagram given?

Answer Details

To establish a steady current through the incomplete circuit diagram, a cell (battery) must be connected between the points P and Q. A cell provides the potential difference (voltage) required for the current to flow in the circuit. Without a cell, the circuit is incomplete, and no current will flow. Therefore, the correct answer is option C, cell.