3 R RB R 4 Information is not sufficient 16 Variation of current passing through a conductor as the voltage applied across its ends as varied is shown in the adjoining diagram If the resistance R is determined at points A B C and D we will find that r 1 Rc RD 2 RB RA 3 Re RB 4 None of these 17 For a cell the graph between the potential difference V across the terminals of the cell and the current 1 drawn from the cell is shown in the figure The e m f and the internal resistance of the cell is V Volts 2 0 1 5 1 0 0 5 0 D 1 2 3 4 5 Hamperes 1 2V 0 522 2 2 V 0 402 3 21 0 522 4 2 V 0 492 18 In the circuit in the figure if the potential at point A is taken to be zero the potential at point B is 1AI R www A 1 IV 3 2V R 2 V D www Hill 00 Hilt 1 2 1 2 4 9 3 9 4 4 1 2 www VIAC2A E 19 Six similar bulbs are connected as shown in the figure with a DC source of emf E and zero internal resistance The ratio of power consumption by the bulbs when i all are glowing and ii in the situation when two from section A and one from section B are glowing will be 292 B 00 192 ww E g 8 B 2 A 4 5 W 1 5 V 2 2V 4 1V 20 A torch bulb rated 4 5 W 1 5 V is connected as shown in Fig 7 35 The emf of the cell needed to make the bulb glow at full intensity is