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Flashcards

Physics Paper 1

Isabelle Neale English 65 cards

Physics Paper 1

Cards in this deck (65)

  1. 1Kinetic energy0.5 x mass x velocity squared
  2. 2Elastic potential equation0.5 x spring constant x extension squared
  3. 3Gravitational potential energyMass x gravitational field strength x height
  4. 4Change in thermal energy?Mass x specific heat capacity (j/kg/c) x change in temperature (°c)
  5. 5Power?energy transfer divided by time
  6. 6Power w/ work done?Work done divided by time
  7. 7what's the law of conservation energy?energy cannot be created or destroyed only transformed into another type of energy
  8. 8What is wasted energy? An example?Didn't intend to make it.
    EG - electrical energy in a light bulb also makes thermal energy - actually don't need this.
  9. 9What are the methods for keeping homes insulated?cavity wall, double glazing, loft insulation, carpets curtains, draught excluders, jacket around the hot water tank
  10. 10Efficiency =useful energy out divided by total energy in
  11. 11efficiencyuseful power out / total power in
  12. 12what is a renewable and finite energy resource?renewable is an energy resource that is not going to run out where as finite is going to run out eventually and we cannot get more.
  13. 13examples of renewable energy sourcessun wind water tidal wave hydroelectric and geothermal energy
  14. 14examples of finite resourcesfossil fuels like coal oil gas and nuclear energy
  15. 15Draw these circuit symbols.Draw these circuit symbols.Draw these circuit symbols.
  16. 16Draw these circuit symbols.Draw these circuit symbols.Draw these circuit symbols.
  17. 17what is chargevalue for electricity flowing through a circuit
  18. 18what is currentthe flow of electrons
  19. 19what is potential differencepushes the current around
  20. 20what is resistancewhatever slows the current down
  21. 21equation for charge?current x time
  22. 22what is charge measured in?coulombs
  23. 23potential difference equationcurrent x resistance
  24. 24what is potential differenceohms
  25. 25what are the three potential difference graphsresistor equals directly proportional
    filament lamp equals rules off at the ends (as temperature increases resistance increases)
    diode = flows in one direction therefore starts at the origin
  26. 26what does a thermistor docontrols are central heating and only lets current flow at certain temperatures
  27. 27on a graph what would a thermistor show if it was a high temperaturea steep line
  28. 28what does an LDR docontrol Street and security lights
  29. 29if there is a bright light what would an LDR show on a grapha steep line
  30. 30Current is the same in which circuit?series
  31. 31the current is shared in which circuitparallel
  32. 32the potential difference is the same in each of the branches in which circuitparallel
  33. 33how do you find the total resistance in a series circuitadd them all up
  34. 34how do we find resistance in a parallel circuit?1 over resistance and so on
  35. 35what is the mains electricity of the UK?230 volts and 50 Hz
  36. 36what are the different components inside a plug and their colours?earth = green and yellow
    neutral = blue
    live = brown
    cable grip
    flex
    fuse
  37. 37how does a fuse work in a plug?the fuse will overheat if the current is too much
  38. 38power is also equal to what in terms of current?power = potential difference times current
  39. 39power is also equal to what related to resistancecurrent squared times resistance
  40. 40what is the equation links energy power and time?energy = power x time
  41. 41what is energy related to in terms of charge the equationenergy = charge x potential difference
  42. 42what are the steps of the national Grid?power stations generate electricity
    use a step-up transformer to increase p.d
    use lots of cables to transport it to the step-down transformer
    delivered to consumers
  43. 43cladding gas particles create pressure. how?particles in gases are free to move, and as they do so they bang into each other and the container. when trying they exert a force on it.
    pressure is the force exerted per unit area.
  44. 44how does increasing the temperature of a gas increases pressure?increasing the temperature means increasing the speed, as particles have more kinetic energy to move.
    this also means they have a large and momentum so they exert a larger force when they collide with the container.
  45. 45density =mass divided by volume
  46. 46how do we find the density of a solid object?balance the mass
    measure length width and height
    calculate volume
  47. 47how do we find the density of an irregular solid object?submerge that solid into a eurake can filled with water.
    the water displaced by the object will be transferred to the measuring cylinder.
    the water displaced is now the volume so plugs object's mass and volume into the formula.
  48. 48what are alpha particles and their properties?2 neutrons and 2 protons
    don't penetrate very far into materials and are stopped quickly absorbed by a sheet of paper and strongly ionising
  49. 49what are beta particles and their properties?fast moving electron released by nucleus
    moderately ionising have a range in air so penetrate moderately and absorbed by sheet of aluminium
  50. 50what are gamma rays and their properties?waves of electromagnetic radiation released by the nucleus
    penetrate far into materials and will travel and distance through air
    weakly ionising because they passed through rather than collide
    absorbed by lead or metres of concrete
  51. 51what do gamma rays not do?they don't change the mass or charge of the nucleus
  52. 52alpha decay decreases the charge and mass of the nucleus. true or falsetrue as particles are made up of two protons and two neutrons so its atomic number is reduced by 2 and its mass number reduces by 4.
  53. 53beta decay decreases the charge of the nucleus true or false.false they increase the charge of the nucleus, the atomic number, by one.
  54. 54What are the energy stores for a kettle?kettle transfers energy electrically from the mains AC supply to the thermal energy store.
  55. 55what's the difference between AC and DC current?AC supplies the current that is constantly changing where is direct current is always flowing in the same direction by direct voltage.
  56. 56how can we investigate adding resistors in series circuits!four identical resistors are needed.
    build a series circuit using one of the resistors and making out of the potential difference of the battery.
    measure the current through the circuit using the ammeter and use this to calculate the resistance.
    add another resistor in series with the first.
    repeat steps 4 and 5 until you've added all the resistors.
    plot a graph of the number of resistors against the total resistance.
  57. 57how can we investigate resistance in parallel circuitsusing the same equipment as investigating series build the same initial circuit.
    measure the total current through the circuit and calculate the resistance.
    add another resistor in parallel with the first.
    measure the current through the circuit - use this and the potential difference of the battery to calculate the overall resistance.
    repeat steps 3 and 4 until the other resistors are added
    plot a graph
  58. 58how can we investigate the factors affecting resistance?attach a crocodile clip to the wire level with 0 cm on ruler
    attach the second crocodile clip to the wire 10 cm away.
    close the switch and record the current and the p d.
    open the switch and move the second crocodile clip 10 cm away
    close the switch again and record the new length current and pd.
    repeat this for a number of different lengths.
    calculate the resistance.
    plot a graph of resistance
  59. 59what does the ammeter and voltmeter measure?ammeter measures the current and must always be placed in series circuits
    the voltmeter measures potential difference and must always be placed in parallel circuits.
  60. 60what is specific latent heat?is the energy required to change the state of a 1 kg mass.
  61. 61what is a half life!the time taken for the number of radioactive nuclei in an isotope to half
  62. 62how do we find the half-lifefind the activity after each half Life by dividing the initial activity by 2.
    x 100 to make it percentage if that is what is required.
  63. 63exposure to radiation is called..irradiation.
  64. 64contamination is..radioactive particles getting onto an object
  65. 65the most dangerous sources are beta and gamma. why?beta and gamma can penetrate the body and get to the delicate organs

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Flashcards on Physics Paper 1, created by Isabelle Neale on 20/11/2018.
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Isabelle Neale
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