1. A battery has a terminal voltage of 1.8 V when supplying a current of 9 A. This voltage rises to 2.02 V when the load is removed. Calculate the internal resistance.
2. Four resistors of values 10 Ω, 20 Ω , 40 Ω , and 40 Ω are connected in parallel across the terminals of a generator having an emf of 48 V and internal resistance 0.5 Ω . Sketch the circuit diagram and calculate
(a) the current drawn from the generator,
(b) the p.d. across each resistor and
(c) the current fl owing through each resistor.