1 In the circuit diagram below, the light bulbs all have the same resistance. a) Switches S, and S, are open. Which bulbs, if any, will light up? b) Switch S, is closed and S, is open. Compare the brightness of bulbs X, Y and Z. S₂ 4|1|1| Z c) Switches S, and S, are closed. Compare the potential differences across bulbs X, Y and Z. d) When switches S, and S, are closed, the reading on A = 0,5 A. What would be the currents through X and Z? e) Another bulb is connected in parallel to X and Y. Will the readings on the ammeter increase, decrease or stay the same? Explain your answer. 2 Consider the circuit diagram below and answer the questions that follow. 3V V₁ 2A A₁ 10 A₁₂ 10 V₁ A₂ a) What are the readings on ammeters A, and A₂? b) Calculate the equivalent resistance of the circuit. c) Predict the voltmeter reading on V₂. 10
