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Figure 14 shows a circuit in which a battery, a switch, a bulb, a resistor P, a variable resistor C, a voltmeter V and two ammeters A and A of negligible resistance are connected. P has resistance of 10 Ohms. When the switch is closed, A reads 1.5 V.
(a) Determine: (i) The current passing through P (ii) The resistance of the bulb
(b) The variable resistor Q is now adjusted so that a large current flows through A. (i) State how this will affect the resistance of the bulb (ii) Explain your answer in (b)(i).