Q.Determine the current flowing through the galvanometer (G) in the given Wheatstone's-bridge circuit, in which a current of 2 A enters the bridge network and the four arm resistances P, Q, R, S together with the galvanometer resistance are labelled in the figure. (The specific numeric value assigned to each of the arms P, Q, R, S and to the galvanometer G could not be reliably matched to its position in the diagram from the source scan's text layer.)