(a)[3]
On Fig. 6.1, sketch the current-voltage graph for a filament lamp and explain why it has this shape.
(b(i))[2]
Calculate the value shown by the voltmeter.
(b(ii))[2]
Calculate the current in the $4.2\,\Omega$ resistor.
(b(iii))[1]
Determine the current in the $2.1\,\Omega$ resistor.
(b(iv))[1]
Determine the ammeter reading.
(b(v))[2]
Calculate the electrical power transferred in the $4.2\,\Omega$ resistor.