A-LEVEL Exam A-LEVEL Physics
                    
                        3.12.1.1 Cathode rays
                    
                                    
                
                    
                        3.12.1.3 Specific charge of the electron
                    
                                    
                
                    
                        3.12.1.4 Principle of Millikan's determination of the electronic charge
                    
                                    
                