This component covers the following areas of study: 1. [[Conduction of electricity ]] 2. [[Resistance ]] 3. [[D.C. circuits ]] 4. [[Capacitance ]] 5. [[Solids under stress ]] 6. [[Electrostatic and gravitational fields of force ]] 7. [[Using radiation to investigate stars ]] 8. [[Orbits and the wider universe]]