1) The particle outside the nucleus is a) a proton b) a neutron c) an electron d) an atom 2) The charge on a neutron is a) positive b) negative c) neutral 3) A proton has a positive charge a) True b) False 4) When an object has become statically charged what has moved a) electrons b) protons c) neutrons d) nucleus 5) An object will be negatively charged if a) it has lost electrons b) it has gained electrons c) it has lost protons d) it has gained protons 6) Which of these is not a use of static charge a) smoke alarms b) paint spraying c) dust precipitators d) photocopiers 7) If two protons are next to each other they will a) repel b) attract c) do nothing 8) Which is the correct equation? a) voltage = current / resistance b) current = voltage x resistance c) resistance = voltage / current d) current = resistance/ voltage 9) What colour is the neutral wire in a plug? a) brown b) red c) blue d) yellow/green 10) What colour is the live wire in a plug? a) brown b) red c) blue d) yellow/green 11) What colour is the earth wire in a plug? a) brown b) red c) blue d) yellow/green 12) Which pin is the fuse connected to? a) earth b) live c) neutral 13) In a circuit the current is 3 A and there is a resistance of 20 ohms. What is the voltage? a) 6.67 V b) 23 V c) 0.15 V d) 60 V 14) On a wave what is the distance between the same point on consecutive waves called? a) wavelength b) amplitude c) frequency 15) In a longitudinal wave what is the name of the area where there is high pressure? a) amplitude b) compression c) rarefaction 16) In a longitudinal wave what is the name of the area where there is low pressure? a) amplitude b) compression c) rarefaction 17) What happens to the mass number of an atom when it emits an alpha particle? a) increase by 2 b) decrease by 2 c) increase by 4 d) decrease by 4 18) A radioactive material has 100,000 undecayed atoms. How many will be left after 3 half lives? a) 25,000 b) 12,500 c) 6,250 d) 50,000 e) 0 19) A radiaoactive substance has a half life of 15 mins. If there are 400,000 atoms to start with, how many will be left after 1 hour? a) 200,000 b) 100,000 c) 50,000 d) 25,000 e) 0 20) Which radioactive particles are used in smoke alarms? a) alpha b) beta c) gamma

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