Question
When an electric current is passed through a cut potato for a considerable time, a coloured spot is formed around one of the electrodes:
$a.$ What is the colour of the spot?
$b.$ Around which electrode $($positive or negative electrode$)$ the coloured spot is formed?
$c.$ Which effect of electric current is involved in this case?
$a.$ What is the colour of the spot?
$b.$ Around which electrode $($positive or negative electrode$)$ the coloured spot is formed?
$c.$ Which effect of electric current is involved in this case?