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    Questions about Electricity and Magnetism
     
Static Electricity   Static Electric Charge
    Electric Field Shapes
  Electric Field Strength
    Electric Potential
    Potential on the Surface of a Charged Conductor
    Charge Density and Curvature of Surface
    The Relation between Potential Difference and Electric Field Strength
    Faraday’s "Ice Pail" Experiment
     
Electric Circuits   Electrical Conduction in Metals
    Electric Circuit Symbols
    Electric Current (Current in Series Circuit, Currents in Parallel Circuits)
    The Relation between Current, Charge and Time
  Voltage
    Measuring Voltages
    Resistance
    Resistors in Series and Parallel
    Potential Dividers
    Variable Resistors
    The Internal Resistance of a Battery
     
Electro-Magnetism   Magnetic Field Shapes
    Measuring the Strength of a Magnetic Field
  Force acting on a Charged Particle moving through a Magnetic Field
    Flux Density due to Current Flowing in a Long Straight Wire
    Force per Unit Length between Two Long Parallel Conductors Carrying Current
    Flux Density inside a Long Coil (Solenoid)
    The Moving Coil Galvanometer
    The Simple D.C. Electric Motor
    The Motion of Charged Particles in Magnetic Fields
    Magnetic Flux
  EMF Induced in a Conductor Moving Through a Magnetic Field
    The Laws of Electro-Magnetic Induction
    The Simple A.C. Generator
    The R.M.S. Value of an Alternating Current (or Voltage)
    The Ideal Transformer
    Eddy Currents
    Electrical Power and Energy
    Transmission of Electrical Energy
     
 
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These pages were contributed by David Hoult BSc, PiS (retired).
Mr Hoult supports a number of animal welfare groups, including:
Compassion in world farming Campaigns against “factory farming” and long distance animal transport.
Branches in UK, USA, France, Italy and many other countries.
L214 Multiple animal welfare campaigns (in France).The name L214 comes from the reference of a law which finally accepted that animals are sentient beings, capable of having feelings and hence capable of suffering.
Comité Radicalement Anti-Corrida Against the barbaric practice of bull “fighting” (or bull torturing to give it a more apt description).
Stop Gavage Against force feeding (gavage) of ducks and geese for foie gras.
Welfarm (formerly Protection Mondiale des Animaux de Ferme, PMAF) French organization having the same aims as CIWF: against “factory farming” and long distance animal transport.
People for the Ethical Treatment of Animals Campaigns especially against the fur trade but also many other animal cruelty issues.
Please consider helping to improve the miserable existence of animals raised for meat, leather, fur etc and to finally put end to the barbaric practice of bull “fighting”.
Thank you.