You are provided with two resistance wires labeled A and B, a1\(\Omega\) standard resistor Rx, and other necessary apparatus. Connect \(R_x\) in the left-hand gap of the metre bridge, a length L= 100cm of wire A in the right-hand gap, and the other apparatus as shown in the diagram above. Determine and record the balance point P on the bridge wire NQ. Measure and record \(l_x\) = NP and \(l_y\) = PQ. Evaluate \(R_1\) = \(\frac{I_{y}}{L_{x}}\) = \(R_x\) Repeat the procedure for four other values of L= 95, 85, 75 and 65cm. In each case, determine and record the balance point P and the length \(l_x\) and \(l_y\). Also, evaluate \(R_1\). Repeat the experiment with the second wire B. Obtain the balance points P and the values of and \(l_x\) and \(l_y\). Evaluate \(R_1\) = \(\frac{I_{y}}{L_{x}}\) = \(R_x\) in each case. Tabulate your readings. Plot a graph of \(R_2\) on the vertical axis against \(R_1\) on the horizontal axis. Determine the slope, s, of the graph. Evaluate k = \(\sqrt s \). State two precautions taken to obtain accurate results. (b)i. State two advantages of using a potentiometer over a voltmeter for measuring the potential difference. ii. Define the internal resistance of a cell.