Unit 1 AQA Physics 3.0 / 5 based on 6 ratings ? PhysicsASAQA Created by: Rhi BuchanCreated on: 28-04-13 14:58 What is the charge for a Proton? 1.60x10^-19 1 of 36 How do you calculate specific charge? charge/mass 2 of 36 What is an isotope? Isotopes have the same proton number but different neautron number 3 of 36 What formula do you use to calculate the energy of a photon? E=hf or E=hc/wavelength 4 of 36 What happens when a particle and an anti-particle collide? Annihilation 5 of 36 What happens during pair roduction? a photon creates a particle and an anti-particle, and vanishes in the process. 6 of 36 what is the minimum energy of a photon needed? hf(min)=2E 7 of 36 How can the exchange of a photon between two like particles be shown? Two objects exchanging photon moving away from eachother. 8 of 36 How can the exchange of a photn between two oppositly charged particles be shown? Two objects exchanging photon moving away from eachother. 9 of 36 Which is correct for a neutron-neutrino interaction? n+v -> p+B- 10 of 36 Which is correct for beta decay? W- boson decays into a Beta- particle and antineutrino 11 of 36 Which is correct for electron capture? p+e- -> n+v 12 of 36 Which is a correct list of conservation laws? Energy and charge, Lepton number, Rest energy and strangeness. 13 of 36 What is the other Fundamental group of particles? Baryons and...? Mesons 14 of 36 List the Leptons. Electron, Muon, Tau and Neutrino. 15 of 36 List the Baryons. Proton and Neutron. 16 of 36 List the mesons. Pion and Kaon. 17 of 36 What are hadrons? Particles and antiparticles that can interact through the strong interaction. 18 of 36 What are Leptons? Particles that do not interact through the strong interaction. 19 of 36 What happens when an Electron absorbs energy? it moves to a shell at higher energy. Atom nw in Excited State. 20 of 36 What happens during de-excitation? atoms absorb energy but do not retain energy perminently. 21 of 36 What can you do to identify the element produced by the light? (Energy levels and spectra) measure the wavelength. 22 of 36 How is a line of colour produced? (Line spectra) When an electron de-excites. 23 of 36 What is ionisation? Electron gains sufficient energy to leave atom alltogether. 24 of 36 Finish the sentence. Excitation will only occur if... the photons energy is exactly equal to the difference in energy of the initial and final level. 25 of 36 What happens to the gold leaf when electroscope is negativly or positivly charged? (photoelectric) It rises and stays 26 of 36 What is Einsteins theory of photoelectricity? E=hf=hc/wavelength 27 of 36 Formula for maximum kinetic energy of a photon? E(max) = hf-0 28 of 36 What is the equation for threshold freuency of a metal? f(min) = 0/h 29 of 36 How do you calculate the resistence of a metal? pd across compnent / the current through it 30 of 36 What is Ohms law? The resistence of a metallic conductor under constant physical conditions is constant. 31 of 36 How do you calculate Resistivity? p=RA/L 32 of 36 What is a superconductor? A wire or device which has zero resistence. 33 of 36 What is one of the current rules? At any juntion in a circuit, the total current leaving the juntion is equal to the total cuttent entering the juntion. 34 of 36 What is internal resistence? Loss of pd per unit current in the source when current passes through it. 35 of 36 What is a potential divider? Two or more resitors in sereis with eachother. pd is divided between the components. 36 of 36
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