Physics 1220/1320 Thermodynamics & Electromagnetism Chapter 19 -20.
Physics Chapter 3- Electromagnetism
Transcript of Physics Chapter 3- Electromagnetism
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8.1 : Analysing the Magnetic Effect of a Current-Carrying Conductor
*Electromagnet
When current flows in the solenoid, a magnetic field is produced.
The magnetic field then magnetises the iron core,thus causing it to be an electromagnet.
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*Magnetic field in Different Types of Conductors
*Factors Affecting the Strength of Magnetic Field of an Electromagnet
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8.2 :Understanding the Force on a Current-carrying Conductors in a Magnetic Field
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*Fleming's Left-hand Rule
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*Factors Affecting Magnitude of Force on a Current-carrying conductor
*Turning Effects of A Current-carrying Coil in A Magnetic Field
8.3 : Analysing Electromagnetic Induction
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*Induced e.m.f. and Induced Current
*Fleming's Right hand Rule
*Lenz's Law Use Lenz's Law to determine thef. polarity of the
induced e.m.f. use Fleming's right hand grip rule to determine
that direction of current flow
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*Magnitude of Induced Current
Faraday's Law Faraday's law states that the magnitude of the
induced e.m.f is directly proportional to the rate of change of magnetic flux linked to the conductor
*Factors Affecting the Magnitude of Induced e.m.f. in Solenoids
*Application of Electromagnet Induction
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*Rotation of Coils in Generators
*Alternating Current and Direct Current
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8.4 : Analysing Transformers
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*Step-up and Step -down Transformers
*Relationship between Np,Ns,Vp and Vs
*Relationship between Output Power and Input Power
An ideal transformers ( with efficiency 100% ) has equal outputpower and input power,or
*Energy Losses in a Transformer
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8.5 : Understanding the Generation and Transmission of Electricity.
*Generation of Electricity
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*Transmission of Electricity
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* The National Grid Network
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