IV Characteristics of Non Ohmic devices

http://twyfordigcsephysics.blogspot.co.uk/2014/10/investigating-iv-characteristics-of-bulb.html

http://twyfordigcsephysics.blogspot.co.uk/2014/10/iv-characteristics-of-diode.html

http://twyfordigcsephysics.blogspot.co.uk/2014/10/blog-post.html