EMF

• Electromotive Force


  What is EMF
• E=Q x EMF


  How to measure EMF
• • E = Energy in joules (J)
  • Q = Charge in coulombs (C)
  • EMF = in volts (V)


  What is E=Q x EMF
• An EMF of 1V on a charge of 1C will give an energy of 1J
• 1V = 1J per coulomb
• • Primary cell = can only be used once
  • Secondary cell = can be recharged and used more than once


  What are the different cells, and their features
• An electrical generator is a device that can turn mechanical energy into electrical energy by electromagnetic induction
• EMF is the force that moves electrons a round a circuit