(a) Three resistors of resistance 2.0Omega, 4.0Omega and 6.0Omega are connected together in a circuit. Draw a circuit diagram to show the arrangement of the resistor which gives (i) Effective resistance of 3.0Omega(ii) Minimum resistance. (b) In figure 11, the voltmeter reads 2.1 V when the switch is open. When the switch is closed, the voltmeter reads 1.8 V and the ammeter reads 0.1A. Determine:(i) The e.m.f of the cell (ii) The internal resistance of the cell(iii) The resistance of the lamp.
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