1) It is present in the centre of an atom. a) Electron b) Nucleus 2) Which particle carry positive (+) charge? a) Electron b) Proton c) Neutron 3) Which particle carry negative (-) charge? a) Electron b) Proton c) Neutron 4) Materials that allow flow of electrons are a) Conductors b) Insulators 5) Which material has free electrons? a) Copper b) Rubber c) Plastic 6) When electrical charges gather or build up at one place it i called a) static electricity b) current electricity 7) Which charges cannot stay together? a) Like b) Unlike

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