1. A complete circuit is required for electric current to flow
Simple Circuits
A complete circuit is required for electric current to flow
Circuits can be drawn using circuit diagrams with correct symbols
Components can be arranged in series or parallel
Simple circuits

2. Circuit Symbols
Circuit symbols

3. Switches – series circuit

4. Switches - parallel circuit

5. Drag & Drop Circuit
Drag & Drop circuit

6. Series circuit – 1 bulb
Series circuit – 1 bulb

7. Series circuit – 2 bulbs
Series circuit – 2 bulbs

8. Parallel Circuit
Parallel circuit

9. Conduction in Metals
Metals are good conductors of electricity because they have delocalised electrons which can carry the current.
Conduction in metals

10. Conduction in Metals
Conduction in metals

11. The negative ions (anions) attract to the positive electrode (anode)
Conduction in liquids
Ionic compounds conduct electricity when molten or dissolved in water. The current is carried by charged particles called ions.
The positive ions (cations) attract to the negative electrode (cathode)
The negative ions (anions) attract to the positive electrode (anode)
At the electrodes the ions can lose their charge and form new substances.
This process is called electrolysis
Conduction in liquids

12. Conduction in liquids
Conduction in liquids