Physics 3 AQA Gcse Quiz General questions on topics in the aqa sylabus for module 3. 3.0 / 5 based on 2 ratings ? PhysicsGCSEAll boards Created by: SarahCreated on: 26-05-11 13:50 What is an industrial use of ultrasound? cleaning jewelery 1 of 30 Why is iron used as the core for a transformer? it is magnetic 2 of 30 What does an alternating current in the primary coil produce in the secondary coil? (in a transformer) an alternating/changing magnetic field 3 of 30 How are atoms of heavy ellements formed? in the neutron star during a supernova 4 of 30 The universe is made up of .............. of galaxies (fill the blank) billions 5 of 30 Why are the coils in a transformer insulated? to prevent current flowing through the iron core 6 of 30 In a stable object in which direction is the resultant force in? there isnt one 7 of 30 An image is real, why? it is made by the intersection of real rays 8 of 30 What is the centre of mass? the point of the object where the mass seems to be most concentrated 9 of 30 What does the generator effect do? makes current 10 of 30 What can you do to reverse the direction of a force? reverse the current direction 11 of 30 How can you increase the size of a force? increase the size of the current 12 of 30 What orbit are comunications satelites in? geostationary 13 of 30 A step up transformer has....? less turns on the primary coil 14 of 30 What do Transformers only work with? alternating current 15 of 30 What do ultrasound waves have? a shorter wavelength than normal waves 16 of 30 What is the image from a diverging lens like? smaller than the object 17 of 30 Why are coils in a transformer insulated? to prevent short circuiting 18 of 30 What is angle r? the angle of refraction 19 of 30 What is the light detecting device in a camera? the film 20 of 30 Ultrasound has a....? a very high frequency 21 of 30 What happens if the radius is increased in centripetal force? the resultant force is decreased 22 of 30 How is a virtual image formed? by the intersection of virtual rays 23 of 30 How do ultrasound waves clean jewelery? by causing vibrations in a fluid which the jewelery is submerged in 24 of 30 Why wont a stable object topple over? because its centre of mass is above its base 25 of 30 When are heavier ellements formed? in a supernova explosion 26 of 30 How can we increase potential difference? use a stronger magnet 27 of 30 What happens to unreflected ultrasound waves? they are absorbed and transmitted 28 of 30 Where is the centre of mass found? below the point of suspension 29 of 30 Why are sliprings and brushes used in a generator? connect stationary and moving points 30 of 30
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