Learners perform an experiment to determine the emf (ε) and the internal resistance (r)
of a battery using the circuit below.
9.1 Which variable has to be kept constant in the experiment? (1)
9.2 Refer to the graph.
9.2.1 Write down the value of the internal resistance of the cell. (2)
9.2.2 Calculate the emf of the battery. (3)
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