(a(i))[1]
Calculate the combined electromotive force (e.m.f.) of the cells.
(a(ii))[3]
Calculate the overall resistance of the circuit.
(a(iii))[2]
Calculate the current in the $3.0\,\Omega$ resistor.
(b(i))[1]
State, using the letters in Fig. 9.1, how you would connect an ammeter to measure the total current in the circuit.
(b(ii))[1]
State, using the letters in Fig. 9.1, how you would connect a voltmeter to measure the potential difference (p.d.) across the $6.0\,\Omega$ resistor.