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Figure 1 shows a cell of e.m.f 2V connected in series with a resistor R and a switch S. voltmeter #V_1# and #V_2# are connected across the cell and the resistor respectively. (a) State the reading of #V_1# with S open. (b) With S closed, #V1# reads 1.6V. State the reading of #V_2#.