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• NCEA on TKI
• NZQA website

Physics 2.6 Demonstrate understanding of electricity and electromagnetism

Subject content

Make sure you have up-to-date notes.

Start your revision at the level that you were expected to know last year:

• electricity and magnetism
• DC electricity

Don't forget to check out the tests.

This year, you may be tested on any of the following phenomena, concepts, and principles:

• Static electricity:
  
  • uniform electric field
  • electric field strength
  • force on a charge in an electric field
  • electric potential energy
  • work done on a charge moving in an electric field.
  
  Relationships or formulae you need to know to apply to solve a problem about static electricity:
  
  
  
  F = Eq
  
  DE_p = Eqd
  
  E_k = ½ mv²
  
  
• DC electricity:
  
  • DC parallel circuits with resistive component(s) in series with the source
  • circuit diagrams
  • voltage
  • current
  • resistance
  • energy
  • power
  • voltage or current characteristics.
  
  Relationships or formulae you need to know to apply to solve a problem about DC electricity:
  
  
  
  
  
  V = IR Ohm's law
  
  P = IV
  
  
  
  R_T = R₁ + R₂ + ...
  
  
  
  
• Electromagnetism:
  
  • force on a current carrying conductor in a magnetic field
  • force on charged particles moving in a magnetic field
  • DC motor
  • induced voltage generated across a straight conductor moving in a uniform magnetic field
  • simple generator.
  
  Relationships or formulae you need to know to apply to solve a problem about electromagnetism:
  
  F = BIL
  
  F = Bqv
  
  V = BvL
  
  

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