Answers to AQA GCSE Alternating and Direct Electrical Circuits (Combined Science)
Practice Questions
1.Draw the circuit symbol to represent the terminals for:
(a)Circuit that has a direct potential difference
(b)Alternating potential difference
2. State two sources of:
(a) direct potential difference
Cell, battery
(b)Alternating potential difference
Mains electricity, generator
3. State the name of the device which can be used to graphically show a direct current, or direct potential difference.
Oscilloscope
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