We can easily draw electrical circuits by following some simple rules.

1. Use a ruler to draw straight lines to represent the wires.

2. Use the correct circuit symbols to represent different components.

3. Ensure that the circuit is closed and has no gaps. 

Write down as many things as possible that is wrong with the circuit below? 
 

Sulphur is an electrical insulator, but it can be made to conduct electricity if a very bright light shines on it. A very bright light shines onto a small circular area in the centre of the charged slab of sulphur. The pattern of charge on the sulphur alters. The simplified diagram represents the new pattern of charge.

Explain why the pattern alters in this way.