Questions on Characteristic Curves - Filament Lamp

Q2. A filament lamp rated 12 V, 1.0 A has a resistance of 4.0 Ω when it carries no current.

(a) On the axes below, sketch the form of the current against voltage characteristic for this lamp.

(4 marks)

(b) The filament lamp is one example of a non-ohmic device.

(i) State what is meant by the term non-ohmic.

(1 mark)

(ii) Name one other example of a non-ohmic device.

(1 mark)
(Total 6 marks)