Work and power of an alternating current

• Resources Structure
• A level
• Physics
• XIV. Alternating current
• 71. Generator and alternating current

• Exam Specifications
• A Level
• AQA GCE AS/A Physics A (5451/6451)
• A2 Module 4 Waves, Fields and Nuclear Energy
• 4. Magnetic effects of currents
• Force on a current carrying wire in a magnetic field
• Motion of charged particles in a magnetic field
• Magnetic flux density, flux, flux linkage
• Electromagnetic induction
• AQA GCE AS/A Physics B (5456/6456)
• V. A2 Module 5 Fields and their Applications
• 2. Magnetic Fields
• Force on a straight wire.
• Force on a moving charge
• Use of Fleming's left hand rule to predict direction of movement of current or charge
• Concepts of flux Ø and flux linkage Ø
• Dependence of flux on flux density and area
• Electromagnetic induction: laws of Faraday and Lenz
• Application of electromagnetic induction principles to the operation of a transformer, including turns ratio and efficiency
• Application of electromagnetic induction principles to the operation of a simple alternator consisting of a single coil
• Eddy currents

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