Fig. 7.1 shows two resistors connected in series with a cell of electromotive force (e.m.f.) 1.50 V and internal resistance $$\(0.28 \Omega\)$$. Fig. 7.1 One of the resistors has resistance $$\(1.0 \Omega\)$$. The other resistor has resistance $$\(R\)$$. The terminal potential difference (p.d.) across the cell is 1.36 V . (i) Show that the current $$\(I\)$$ in the circuit is 0.50 A . (ii) Calculate the combined resistance of the two resistors. resistance $$\(=\)$$ .................................................. $$\(\Omega\)$$ (iii) Use your answer in (a)(ii) to determine resistance $$\(R\)$$. $$\[ R= \]$$ .................................................. $$\(\Omega\)$$

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