AQA GCSE Electric Field
Electric Field.
An electric field will occur around a charged object. See the diagram below.
The lines around the spheres, show lines of force. On the positive sphere the lines of force point away from the sphere, whilst on negative sphere lines of force point towards the sphere
Strength of the Electric Field
The distance betwen the field lines indicates the strength of the electric field.
The closer the field lines are, the stronger the electric field.
Nearer to the object or sphere, the field lines are closer, so the electric field is stronger.
Practice Questions
1.Draw the position of the electric field lines on the Van De Graaf generator below.
Assume that the dome acts similar to a standard sphere.
2. Using the diagram above, state where the electric field would be strongest.
3. The charge on the metal dome is currently positive. Describe how the field lines would change if the metal dome had the opposite charge.
Absorption and Emission of EM Radiation
JJ Thomson and Plum pudding model
Ernest Rutherford and the Nuclear Model
Niels Bohr changing the Nuclear Model
Discovering the Proton and Neutron
Measuring radiation from radioactivity
Radiation types and properties
Random nature of radioactive decay
Radioactive contamination or irradiation
Hazards of contamination and irradiation
Studies on the effects of radiation on humans
Different half lives of radioactive isotopes
Nuclear Fission Chain Reaction
Writing nuclear fission equations