a) Dose the LED glow? b) What do you observe the surface of the potato?

Question

Testing the effect of electric current on potato. 

Take a potato. Cut into two halves and take one half of it. Construct tester with LED bulb. Insert two copper wires of the tester into the potato. Leaving some distance (around 1 cm) between them.

a) Dose the LED glow?

b) What do you observe the surface of the potato?

c) What could be the cause behind this change?

d) Will other vegetables also show such an effect?

Answer 1

a) Yes, the LED glows. 

Leave the inserted wires for 20-30 minutes.

b) A greenish blue spot is seen on the potato around the wire connected to the positive terminal of the battery. But no such spot is seen around the other wire connected to the negative terminal. This greenish spot is due to chemical change in the potato.

c) There is chemical change occurred in the potato.

d) Vegetable like carrot, beetroot, cucumber, radish, sweet potato show the chemical change there by the LED glows.