15 The Graph below depicts the voltage across the cell (or equally 144 13- across the variable resistor) as the 12 variable resistance is increased. 11 Determine 090 a) the emf of the cell. 0.70 b) the current in the external 050 circuit when the variable resistor 0.40 30 is reduced to zero. 020 c) the internal resistance of the cell. 010 00 010 020 0.30 040 0.50 060 0.70 0 0.90 10 LI 12 13

15 The Graph below depicts the voltage across the cell (or equally 144 13- across the variable resistor) as the 12 variable resistance is increased. 11 Determine 090 a) the emf of the cell. 0.70 b) the current in the external 050 circuit when the variable resistor 0.40 30 is reduced to zero. 020 c) the internal resistance of the cell. 010 00 010 020 0.30 040 0.50 060 0.70 0 0.90 10 LI 12 13