Displaying results which match all of the below:
  • Efficiency - Electric heater in Al

    An electric heater used to heat a 1kg mass of Aluminium (SHC 900J/K/kg)
    The meter readings were:
    2.51 Amps, 8.49 Volts and the temperature was raised through 6 Kelvin in 450 secs
    Efficiency = useful energy out / total energy in
    Energy in = I x V x t
    Energy out = m x shc x T

  • Efficiency - Electric heater in water

    A lamp was used to raise the temperature of 50ml (50ml has a mass of 0.05kg) of water (SHC 4200J/K/kg) by 30 Kelvin.
    The meter readings were 1.68 Amps, 11.15 Volts and the time taken was 600 secs
    Efficiency = useful energy out / total energy in
    Energy in = I x V x t
    Energy out = m x shc x T

  • Efficiency - Electric motor

    A geared electric motor used to lift a 1kg mass through a height of 1m.
    The meter readings were:
    0.23 Amps, 5.97 Volts and the mass was lifted 1m in 29.6 secs
    Efficiency = useful energy out / total energy in
    Energy in = I x V x t
    Energy out = m x g x h
    (g = 9.81 N/kg)

  • Electrical Energy poster

    Simple A3 Electrical Energy poster for Edexcel Topic 9