Paper 1 H - SAMPLE SET 1 Q7
7) A student set up the electrical circuit shown in Figure 9.
7.1) The ammeter displays a reading of 0.10 A.
Calculate the potential difference across the 45 Ω resistor. [2 marks]
Calculate the potential difference across the 45 Ω resistor. [2 marks]
Potential difference = ___________ V
7.2) Calculate the resistance of the resistor labelled R. [3 marks]
Resistance = ___________ Ω
7.3) State what happens to the total resistance of the circuit and the current through the circuit when switch S is closed. [2 marks]
(Total for Question 7 = 7 marks)
(Total for Question 7 = 7 marks)