AQA GCSE Physics
Physics
Physics (TRIPLE not combined)
Sample Data
| Front | What happens when insulating mateirals are rubbed against each other |
| Back | They become electrically charged as negatively charged electrons are transferred. The material that gains electrons becomes negatively charged and vice versa for the one that lost electrons |
| Front | How a loudspeaker/headphone works |
| Back | A cone has a coil of wire wrapped around one end, connected to an AC supply. A permanent magnet goes inside the coilCurrent passes through the coil generates a magnetic field which interacts with the magnetic field of the permanent magnet.A resultant force is produced which causes the cone to move, and when the current switched direction so will the direction of the force so the cone will move in the opposite direction. The cone vibrates so the air molecules begin to move to produce the pressure variations needed for a sound wave The air molecules bunch together to form comrpessions and spread out to form rarefactions.
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| Front | Why does crisps packets swell up in aeroplanes |
| Back | The air pressure in the cabin is lower than the air pressure in the bag so an imbalance force. |